syoukera
commented
3 years ago - One promising approach to eliminate thermoacoustic instabilities in combustion appliances is the use of adaptive control of the flame/burner acoustic transfer function (TF).（燃焼器の熱音響不安定性を除去するための手法の一つとして火炎/バーナの音響変換関数(TF)を制御する方法が有望視されている）
- 電界(EF)によってTFを制御したい
- The effect of a DC EF on the acoustic TF of premixed flat burner-surface stabilized flames is studied systematically as a function of the following parameters: flow velocity, equivalence ratio, applied voltage and burner geometry.（バーナ表面で安定化された予混合平面火炎において直流のEFが音響のTFに与える影響を調べた）
- It is established that the response of the flame TF on the DC EF can be characterized as a TF shift towards higher frequencies. The mechanism of TF alteration is related to the decrease of the flame stand-off distance and the related increase of the burner deck surface temperature.（直流EFによってTFが高周波数側にシフトする．火炎がバーナに近づいて温度が変化したことが原因だと考えられる）
@article{VOLKOV2013955, title = {Experimental evaluation of DC electric field effect on the thermoacoustic behaviour of flat premixed flames}, journal = {Proceedings of the Combustion Institute}, volume = {34}, number = {1}, pages = {955-962}, year = {2013}, issn = {1540-7489}, doi = {https://doi.org/10.1016/j.proci.2012.06.175}, url = {https://www.sciencedirect.com/science/article/pii/S1540748912002830}, author = {E.N. Volkov and V.N. Kornilov and L.P.H. {de Goey}}, keywords = {DC electric field, Thermoacoustic instability, Transfer function, Premixed, Laminar flat flame}, abstract = {One promising approach to eliminate thermoacoustic instabilities in combustion appliances is the use of adaptive control of the flame/burner acoustic transfer function (TF). Application of a DC electric field (EF) as a spatially distributed, easily and quickly adjustable and low-energy method to affect the flame behaviour may be considered as a possible actuation method to control the flame TF. Experimental evaluation of such a possibility is the main goal of the present study. The effect of a DC EF on the acoustic TF of premixed flat burner-surface stabilized flames is studied systematically as a function of the following parameters: flow velocity, equivalence ratio, applied voltage and burner geometry. It is established that the response of the flame TF on the DC EF can be characterized as a TF shift towards higher frequencies. The mechanism of TF alteration is related to the decrease of the flame stand-off distance and the related increase of the burner deck surface temperature. From a practical point of view, the efficiency of the EF control of the flat flame TF is restricted to a relatively narrow frequency range around the position of the TF resonance peak. To get insight into the physics of the EF–flame interaction, the method of [1] to measure the EF effect on the adiabatic flame speed is improved and the measurement range is extended. The new measurements allow a revision of previous results and allow an explanation for the ambiguity in the old measurements.} }