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y-yosuke / formula-ppoino

A side-by-side two-seater car of the early 2000s formula style
Creative Commons Attribution 4.0 International
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シミュレーションの内容を英語で説明 #16

Closed y-yosuke closed 8 years ago

y-yosuke commented 8 years ago

して欲しいです，とのことで英語編集用の Issue．ここで編集してHTMLでコピーかな． 英語でメールよりも長い文章書くの久しぶり... orz （そんなに長くないけど）

今週末（〜2016年9月11日）に書き上げる予定．

説明の対象は主に fp-023c - Front Aero Devices https://www.simscale.com/projects/yosukegb4/fp-023c_-_control/

fp-023b - Front Aero Devices も関係してくるんだけどどの程度絡めるか？ https://www.simscale.com/projects/yosukegb4/fp-023b_control/

酷い英語があったら指摘して頂けるとありがたいです．

y-yosuke commented 8 years ago

Editing now...

The car

This car project is my formula style 2-seater car project published in GitHub.

https://github.com/y-yosuke/formula-ppoino

I designed the car in the style of the early 2000s formula cars. The reason of "2-seater" is to feel the joy riding in the formula car with your friends on the road, it is not only for the competitions in racing circuits.

"fp" are the initials of "formula-ppoino". "-ppoino" is a Japanese expression that means "thing(s) looks/sounds/drives like -", so "formula-ppoino" means it "looks like a formula car".

The model

I designed the car using the modelling software Rhinoceros.

To import multiple faces body, front wheels and rear wheels into one geometry, I exported ASCII STL files of each faces from Rhinoceros and edited the names of the solids in these ASCII STL files manually. Then I put these STL files together into the one STL file using "cat" command and uploaded it.

The size of the mesh required is at least 9M nodes in this case. It was derived from the result of the simulations in "fp-023b Test-C". https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/

The aim of the simulations

Generally in the aerodynamic development of the racing cars, you mainly focus on the characteristics below.

Through the simulations of ""fp-023b Test-C" https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/", I found the front downforce was not enough. It depends on the car weight balance and how the vehicle ride height changes, but I tentively set the goal that the center of the front and rear downforces will be about 60-65%.

y-yosuke commented 8 years ago

Editing now...

The aim of the simulations

Generally in the aerodynamic development of the racing cars, you mainly focus on the characteristics below.

Through the simulations of "fp-023b Test-C" https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/", I found the front downforce was not enough. It depends on the car weight balance and how the vehicle ride heights change, but I provisionaly set the goal that the center of the front and rear downforces will be about 60-65%. ( Clf : Clr = 40-35 : 60-65 )

Through the simulations of "fp-023b "

emijah commented 8 years ago

Edited

The aim of the simulations

Generally, during aerodynamic development of racing cars, you mainly focus on the characteristics below.

Through simulation, as in ""fp-023b Test-C" https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/", I found there was insufficient front downforce. It depends on the car weight balance and how the vehicle ride heights change, but I provisionaly set the goal to distribute the front and rear downforces to be about 60-65%. ( Clf : Clr = 40-35 : 60-65 )

y-yosuke commented 8 years ago

@emijah ありがとうございます！

emijah commented 8 years ago

@y-yosuke これよりも前の部分は直接投稿した文書を編集してしまったかもしれません。確認しますね。

emijah commented 8 years ago

一応Edited

The car

This car project is my formula style 2-seater car project published in GitHub.

https://github.com/y-yosuke/formula-ppoino

I designed the car in the style of the early 2000s formula cars. The reason it's a "2-seater" is to allow you to share the joy of riding in a formula car with your friends on the road, it is not only for competition on racing circuits.

The prefix "fp" are the initials of "formula-ppoino". "-ppoino" is a Japanese expression that means "thing(s) looks/sounds/drives like -", so "formula-ppoino" means it "looks like a formula car".

The model

I designed the car using the modelling software Rhinoceros.

To import multiple faces, the body, front wheels and rear wheels into one geometry, I exported ASCII STL files of each faces from Rhinoceros and edited the names of the solids in these ASCII STL files manually. Then I put these STL files together into the one STL file using "cat" command and uploaded it.

The size of the mesh required is at least 9M nodes in this case. It was derived from the result of the simulations in "fp-023b Test-C". https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/

y-yosuke commented 8 years ago

ちなみに SimScale の中の人から説明を書き加えて下さいというお願いで， 下記フォーラムのページを参考にここまでは全然詳しくなくて大丈夫とのこと． https://www.simscale.com/forum/t/wind-turbine-blade-fluid-and-structural-optimisation-using-cae/37492

主に私が SimScale に貼った ParaView で Post-process した画像の解説が欲しいそうです． （それらの説明がそれなりであれば）Project Spotlight として来週あたり紹介するかもとのこと．

emijah commented 8 years ago

よかったねぇ！ 実際に作るためのスポンサーも募集中と書いてみては？

2016年9月9日 19:02 Yosuke Yamamoto notifications@github.com:

ちなみに SimScale の中の人から説明を書き加えて下さいというお願いで， 下記フォーラムのページを参考にここまでは全然詳しくなくて大丈夫とのこと． https://www.simscale.com/forum/t/wind-turbine-blade-fluid-and-structural- optimisation-using-cae/37492

主に私が SimScale に貼った ParaView で Post-process した画像の解説が欲しいそうです． （それらの説明がそれなりであれば）Project Spotlight として来週あたり紹介するかもとのこと．

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/y-yosuke/formula-ppoino/issues/16#issuecomment-245872700, or mute the thread https://github.com/notifications/unsubscribe-auth/AAXmldsBNOYa6l8mgAOsAUKY-SWoxJc3ks5qoS68gaJpZM4J4xMY .

y-yosuke commented 8 years ago

GitHub のコメントって編集履歴は残らないんでしたっけ？

y-yosuke commented 8 years ago

The conditions of the simulations

The conditions are in accordance with the state of the car running on public roads.

The result of "fp-023b - Front Aero Devices" (Summary)

I tested some front aero-devices in the simulations "fp-023b Front Aero Devices https://www.simscale.com/projects/yosukegb4/fp-023b_control/ ". The following front aero-devices increased the front downforce effectively. These decreased the aerodynamical front lift to almost zero, but the ratio of front-rear downforce was still 96% on the rear axle.

Coefficients of the Body and Wheels

Coef. fp-023b Control fp-023c Control Difference Difference % Remarks
Cm 0.1330 0.0781 -0.0549 -41.3
Cd 0.5510 0.5590 +0.0080 +1.4
Cl -0.1550 -0.1693 -0.0142 -9.2
Clf 0.0555 -0.0066 -0.0620 -111.8
Clr -0.2105 -0.1627 +0.0478 +22.7
CoP 1.3579 0.9613 -0.3966 -39.7
L/D -0.2813 -0.3028 -0.0215 -7.6
y-yosuke commented 8 years ago

さてこれからが本題かぁ... → https://www.simscale.com/forum/t/fp-023c-control-simulation-project-by-yosukegb4/36689/7

各結果の説明をしてそれの中で画像も再アップロードした方が良いような気がする．

y-yosuke commented 8 years ago

【 fp-023c - Summary of the Results (Part 1) 】Front Fender Louvers

Edited in https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246084217

y-yosuke commented 8 years ago

【 fp-023c - Summary of the Results (Part 2) 】Front Fender Stay (Part 1)

Edited in https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246096612

y-yosuke commented 8 years ago

【 fp-023c - Summary of the Results (Part 3) 】Front Fender Stay (Part 2)

Edited in https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246107120

y-yosuke commented 8 years ago

後は...

かな． 渦度に関しては私の工学的な理解が浅いので説明はしないでおこうかと思っている．

y-yosuke commented 8 years ago

【 fp-023c - Summary of the Results (Part 4) 】S-Duct B

Edited in https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246163741

y-yosuke commented 8 years ago

Front / Rear のダウンフォースの割合は風洞実験の経験から設定した暫定値なので 本シミュレーション上ではそれは Body Only の Coefficients に相当するから "of the body" を入れた方が良い気がする．

I provisionaly set the goal to distribute the front and rear downforces to be about 60-65%.

I provisionaly set the goal to distribute the front and rear downforces of the body to be about 60-65%.

y-yosuke commented 8 years ago

余計なことは言わない方が良いかな．（と，ここで書いてしまったらあまり意味ないかな...）

Ride Heights Comparison

Ideally, various vehicle ride heights should be tested for each aero-devices to know the sensitivity of the downforce and balance to the ride heights. But it needs a lot of 'core hours' to solve.

y-yosuke commented 8 years ago

【 fp-023c - Summary of the Results (Part 5) 】Front Fender Louver C + Louver Stay B

Edited in https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246167618

y-yosuke commented 8 years ago

【 fp-023c - Summary of the Results (Part 6) 】Ride Heights Comparison

Edited in https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246168325

y-yosuke commented 8 years ago

私の知識で説明出来るのは大体これら ↑ ぐらいかな．

やはり乱流エネルギー k の図は説明に十分な知識を持ち合わせていないので避けておこう．

y-yosuke commented 8 years ago

修正していただいたものをはじめ，まとめ，あんど，投稿．

Contents

Car

This car project is my formula style 2-seater car project published in GitHub.

https://github.com/y-yosuke/formula-ppoino

I designed the car in the style of the early 2000s formula cars. The reason it's a "2-seater" is to allow you to share the joy of riding in a formula car with your friends on the road, it is not only for competition on racing circuits.

The prefix "fp" are the initials of "formula-ppoino". "-ppoino" is a Japanese expression that means "thing(s) looks/sounds/drives like -", so "formula-ppoino" means it "looks like a formula car".

Model

I designed the car using the modelling software Rhinoceros.

To import multiple faces, the body, front wheels and rear wheels into one geometry, I exported ASCII STL files of each faces from Rhinoceros and edited the names of the solids in these ASCII STL files manually. Then I put these STL files together into the one STL file using "cat" command and uploaded it.

The size of the mesh required is at least 9M nodes in this case. It was derived from the result of the simulations in "fp-023b Test-C". https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/

Conditions

The conditions of the simulations are in accordance with the state of the car running on public roads.

Aim of the simulations

Generally, during aerodynamic development of racing cars, you mainly focus on the characteristics below.

Through simulations, as in "fp-023b Test-C https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/ ", I found there was insufficient front downforce. It depends on the car weight balance and how the vehicle ride heights change, but I provisionaly set the goal to distribute the front and rear downforces of the body to be about 60-65%. ( Clf : Clr = 40-35 : 60-65 )

Summary of of the simulation "fp-023b - Front Aero Devices"

I tested some front aero-devices in the simulations "fp-023b - Front Aero Devices https://www.simscale.com/projects/yosukegb4/fp-023b_control/ ". The following front aero-devices increased the front downforce effectively. These decreased the aerodynamical front lift to almost zero, but the ratio of front-rear downforce was still 96% on the rear axle.

Coefficients of the Body and Wheels

Coef. fp-023b Control fp-023c Control Difference Difference % Remarks
Cm 0.1330 0.0781 -0.0549 -41.3
Cd 0.5510 0.5590 +0.0080 +1.4
Cl -0.1550 -0.1693 -0.0142 -9.2
Clf 0.0555 -0.0066 -0.0620 -111.8
Clr -0.2105 -0.1627 +0.0478 +22.7
CoP 1.3579 0.9613 -0.3966 -39.7
L/D -0.2813 -0.3028 -0.0215 -7.6
y-yosuke commented 8 years ago

各項目題の "The" は外すかな...

emijah commented 8 years ago

今日の昼休みにまた見ますね

2016-09-12 10:45 GMT+09:00 Yosuke Yamamoto notifications@github.com:

各項目題の "The" は外すかな...

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/y-yosuke/formula-ppoino/issues/16#issuecomment-246220811, or mute the thread https://github.com/notifications/unsubscribe-auth/AAXmlXzLJFg9k0Z3GvgxVyq8fzlGIbNUks5qpK68gaJpZM4J4xMY .

y-yosuke commented 8 years ago

ありがとうございます．正午までに整えてまとめておきます．

y-yosuke commented 8 years ago

Front Fender Louvers

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246084217

Front Fender Stay (Part 1)

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246096612

Front Fender Stay (Part 2)

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246107120

S-Duct B

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246163741

Front Fender Louver C + Louver Stay B

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246167618

Ride Heights Comparison

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246168325

Conclusions

Conclusions or Conclusion ???

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246227805

y-yosuke commented 8 years ago

STL モデルのエクスポート・インポートの話は別に重要じゃないかな... とも思うけど， 私の方からは投稿はしておいて，先方で不必要だと思えば転載のときに削ってもらえるでしょう．

y-yosuke commented 8 years ago

Conclusion みたいなのもあった方が良いのかな．

的な展開

emijah commented 8 years ago

ルーバーってlouvreって綴りじゃなかったでしたっけ？

y-yosuke commented 8 years ago

https://en.wikipedia.org/wiki/Louver Louver : 米国語 Louvre : 英国語 のようです．レーシングカーでは「英国語」が多い気がしますが， 会社員当時は適当に Louver を使っていたような気がします．

y-yosuke commented 8 years ago

"Musée du Louvre" も Louvre か．勉強になるー

emijah commented 8 years ago

意図的にLouvreを広めていたつもりだったのですが、違ったか。 Conclusionsを現在進行形にするかどうかですが、今やっている内容でとどめるならば、それでいいんじゃないですかね？

一度まとまったやつをEdited ^^^で変更箇所をマーキングしたのですが、ソースを見る必要があります。（忘れているところもあるかも..）

Contents

Car

This car project is my formula style 2-seater car project published in GitHub.

https://github.com/y-yosuke/formula-ppoino

I designed the car in the style of the early 2000s formula cars. The reason it's a "2-seater" is to allow you to share the joy of riding in a formula car with your friends on the road, it is not only for competition on racing circuits.

The prefix "fp" are the initials of "formula-ppoino". "-ppoino" is a Japanese expression that means "thing(s) looks/sounds/drives like -", so "formula-ppoino" means it "looks like a formula car".

Model

I designed the car using the modelling software Rhinoceros.

To import multiple faces, the body, front wheels and rear wheels into one geometry, I exported ASCII STL files of each faces from Rhinoceros and edited the names of the solids in these ASCII STL files manually. Then I put these STL files together into the one STL file using "cat" command and uploaded it.

The size of the mesh required is at least 9M nodes in this case. It was derived from the result of the simulations in "fp-023b Test-C". https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/

Conditions

The conditions of the simulations are in accordance with the state of the car running on public roads.

Aim of the simulations

Generally, during aerodynamic development of racing cars, you mainly focus on the characteristics below.

Through simulation, as in "fp-023b Test-C https://www.simscale.com/projects/yosukegb4/fp-023b_test-c/ ", ^ I found there was insufficient front downforce. It depends on the car weight balance and how the vehicle ride heights change, but I provisionaly set a goal to distribute the front and rear downforces of the body to ^変わるから be about 60-65%. ( Clf : Clr = 40-35 : 60-65 )

Summary of of the simulation "fp-023b - Front Aero Devices"

I tested some front aero-devices in the simulation "fp-023b - Front Aero Devices https://www.simscale.com/projects/yosukegb4/fp-023b_control/ ". The following front aero-devices increased the front downforce effectively. These decreased the aerodynamical front lift to almost zero, but the ratio of front-rear downforce was still 96% on the rear axle.

Coefficients of the Body and Wheels

Coef. fp-023b Control fp-023c Control Difference Difference % Remarks
Cm 0.1330 0.0781 -0.0549 -41.3
Cd 0.5510 0.5590 +0.0080 +1.4
Cl -0.1550 -0.1693 -0.0142 -9.2
Clf 0.0555 -0.0066 -0.0620 -111.8
Clr -0.2105 -0.1627 +0.0478 +22.7
CoP 1.3579 0.9613 -0.3966 -39.7
L/D -0.2813 -0.3028 -0.0215 -7.6
emijah commented 8 years ago

そうそう。キーワードをlouvre aerodynamicにしないと永久にリファレンスは出てきません

2016-09-12 12:33 GMT+09:00 Yosuke Yamamoto notifications@github.com:

"Musée du Louvre" も Louvre か．勉強になるー

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/y-yosuke/formula-ppoino/issues/16#issuecomment-246236092, or mute the thread https://github.com/notifications/unsubscribe-auth/AAXmlVeuY9EnXUF7Dp7FrgyZbNwGIgD_ks5qpMgcgaJpZM4J4xMY .

y-yosuke commented 8 years ago

シミュレーションの結果のまとめ各項目もこっちにコピーしておいた方が良かったですか？

Front Fender Louvers Content here : #12 (comment)

...

y-yosuke commented 8 years ago

前半の修正点 ^ 理解・了解しました．

emijah commented 8 years ago

Edited

Front Fender Louvres

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246084217

Front Fender Stay (Part 1)

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246096612

Front Fender Stay (Part 2)

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246107120

S-Duct B

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246163741

Front Fender Louvre C + Louvre Stay B

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246167618

Ride Heights Comparison

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246168325

Conclusions

Conclusions or Conclusion ???

Content here : https://github.com/y-yosuke/formula-ppoino/issues/12#issuecomment-246227805

emijah commented 8 years ago

動画とか見入っちゃいますね

y-yosuke commented 8 years ago

これはリンク先の英語の内容も大丈夫だったということでしょうか？

y-yosuke commented 8 years ago

SimScale の forum は基本的には Markdown に対応しているものの Markdown の表には対応していない HTML でないとだめのようだ．

emijah commented 8 years ago

リンク先は後で確認します

y-yosuke commented 8 years ago

すみません．よろしくお願い致します．

y-yosuke commented 8 years ago

HTML でも’表’が表示されないなぁ...

y-yosuke commented 8 years ago

表は TeX で書きなはれ，ということなのかな？ https://www.simscale.com/forum/t/mathjax-arrays/444

y-yosuke commented 8 years ago

TeX でも表示されない．キャプチャして画像貼りつけかな．

y-yosuke commented 8 years ago

Louver / Louvre 問題は既に ParaView キャプチャした画像に Louver で書いてあるので Louver で統一します．

y-yosuke commented 8 years ago

もしかしてこれらのドキュメント全体の標題も必要な気がしてきた... Result of "fp-023c - Front Aero Devices" ? Results ??? Result of simulation "fp-023c Front - Aero Devices" ?

emijah commented 8 years ago

@y-yosuke なにー！(Louvre)

fp-023c - Front Aero Device Study

はどうですか？

y-yosuke commented 8 years ago

@emijah すみません (Louvre)

標題はそれにしましょう．

y-yosuke commented 8 years ago

アップロード始めました．"Sorry. Now Editing..." を冒頭に書きながら． 追加修正点は私が後から手動修正します． https://www.simscale.com/forum/t/fp-023c-control-simulation-project-by-yosukegb4/36689/17

y-yosuke commented 8 years ago

説明用にアップロードした画像をこちらにも保管しておく． fp-023x_rhino-screenshot