Statistical characteristics of spray autoignition of transient kerosene jet in cross flow  

作　　者：Chi ZHANG Chunlong HE Xin XUE Yuzhen LIN Jibao LI Chongchong LIU 

机构地区：[1]National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,Research Institute of Aero-Engine,Beihang University,Beijing 100083,China [2]AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China

出　　处：《Chinese Journal of Aeronautics》2021年第12期73-84,共12页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.91641109 and 61827802)。

摘　　要：To study statistical characteristics of the random spray autoignition,aviation kerosene was injected transiently into non-vitiated air crossflow in a flow reactor with optical accesses.The operating conditions were relevant to gas turbine combustor:the air crossflow pressure and temperature were in the range of 1.4-1.7 MPa and 830-947 K,respectively,and the jet-tocrossflow momentum flux ratios were 20,50 and 80.Statistical distributions of random ignition delay times with adequate convergence were estimated based on histograms.The dependences of the distributions on reactor pressure,temperature,and jet-to-crossflow momentum flux ratio were studied.The results show that the resulting distributions appear more concentrated with the increase of air temperature or jet-to-crossflow momentum flux ratio.And then the correlations for the mean and standard deviation of the ignition delay time sample data were developed based on the present results.Compared with the correlations of ignition delay time of homogeneous premixed gas-phase kerosene/air mixture reported in the literature,the results show a greater significance pressure dependence and lower temperature sensitivity of the ignition delay time of nonpremixed kerosene spray.

关 键 词：CROSSFLOW Flow reactor Ignition delay time Probability density Spray autoignition Transient injection 

分 类 号：V312[航空宇航科学与技术—航空宇航推进理论与工程]