采用高精度红外热像仪测量了平板绝热气膜冷却效率，比较了双叉排孔和单排孔气膜冷却效率，分析了吹风比(M=0.65，1.0，1.5)和脉动频率（St=0，0.01，0.015，0.025）以及孔间作用对气膜冷却效率的影响，结合数值计算得到的瞬态流场和温度场分析了脉动射流气膜冷却下的流动传热机理。结果表明：在稳态射流工况下，单排孔的气膜冷却效率随着吹风比的增加而减小，双叉排孔的气膜冷却效率却随着吹风比的增加而增大；在脉动射流时，单排和双叉排孔的气膜冷却效率在低吹风比下低于稳态射流，在高吹风比下，脉动射流对气膜冷却效率的影响减小，且低频脉动射流气膜冷却效率略高于稳态射流。

The cooling efficiencies of plane surface of adiabat film with single row and double rows of film holes under pulsating jet were measured and compared by using a highprecision infrared thermal camera to analyze the effects of blowing ratios of 0.65, 1.0 and 1.5, pulsating frequencies of 0, 0.01, 0.015 and 0.025 and interpore action on film cooling efficiency. Meanwhile, the flow and heat transfer mechanism was analyzed combined with transient flow field and temperature field obtained by numerical calculation under the pulsating jet film cooling condition. Results show that for the steady jet film cooling, the cooling efficiency of single row of holes decreases with the increase of blowing ratio, while the cooling efficiency of double rows of holes increases with the increase of blowing ratio; the cooling performance of single row and double rows with pulsating jet is lower than the steady state jet at low blow ratio, while the pulsating jet has a decreasing impact on film cooling efficiency at high blow ratio, and the low frequency pulsating jet film cooling has higher cooling effeciency than the steady state jet.

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山西省基础研究计划面上项目(202203021211122)；广州市基础与应用基础研究项目（SL2022A04J01885）