Experimental Investigations of the Flow Field Structure and Interactions between Sectors of a Double-Swirl Low-Emission Combustor:Effects of Main Stage Swirl Intensity and Venturi Angle  

作　　者：FAN Xiongjie XU Gang LIU Cunxi ZHANG Chi WANG Jianchen LIN Yuzhen 

机构地区：[1]Key Laboratory of Light-duty Gas-turbine,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China [2]University of Chinese Academy of Sciences,Bejjing 100049,China [3]National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,Collaborative Innovation Center of Advanced Aero-Engine,School of Energy and Power Engineering,Beihang University,Bejing 100191,China

出　　处：《Journal of Thermal Science》2020年第3期813-819,共7页热科学学报（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant No.51306182 and 61827802)。

摘　　要：Effect of venturi angle and main stage swirl intensity on flow field and interactions were investigated using PIV.The results showed the difference between the side sector and the middle sector was caused by interactions.The interactions were stronger with the rise of the main stage swirl intensity.When the swirl intensity was 0.7 and 0.9,there was little difference of the width of the recirculation zone.But the flow field had a great difference when the swirl intensity was 0.5 and 0.7,which means that when the swirl intensity was small,the swirl intensity had a great influence on the flow field.Venturi angle had a great influence on the flow field structure and interactions when the venturi angle was big,such as 90°.The venturi angle just had a small influence on the width of the recirculation zone when the venturi angle was relatively small,such as 28°and 52°.The velocity of the center plane between two sectors(plane 3)was small.There was a recirculation zone at upstream of the center plane between two sectors(plane 3)when the swirl intensity was 0.7 and 0.9,whereas not one when the swirl intensity was 0.5.The above was induced by interactions.In addition,the velocity of plane 1,plane 3,and plane 5 when the venturi angle was 52°was smaller than that of 28°and 90°.

关 键 词：COMBUSTOR recirculation zone PIV swirl intensity venturi angle 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]