平面撞击流振荡特性  

Oscillation characteristics of two planar opposed jets

作　　者：孙志刚[1] 李伟锋[1] 刘海峰 于遵宏[1] 

机构地区：[1]华东理工大学煤气化教育部重点实验室,上海200237

出　　处：《化工学报》2009年第2期338-344,共7页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2004CB217703);教育部长江学者与创新团队发展计划项目(IRT0620)~~

摘　　要：The oscillation characteristics of two planar opposed jets were studied by using high-speed camera,smoke wire visualization and hot-wire anemometry(HWA).The oscillation periods of two planar opposed jets at different nozzle separations and exit nozzle velocities were studied.The results showed two models of instabilities:streamwise quasi-periodic oscillation model and deflection oscillation model.The oscillation model was mainly streamwise quasi-periodic oscillation model at L<5H(where L was the nozzle separation and H was the nozzle slot height),and it was mainly deflection oscillation model at L>5H.The deflection oscillation model had a stable period which decreased with increasing normalized nozzle separation.The oscillation characteristics of two planar opposed jets were studied by using high-speed camera, smoke wire visualization and hot wire anemometry （HWA） . The oscillation periods of two planar opposed jets at different nozzle separations and exit nozzle velocities were studied. The results showed two models of instabilities, streamwise quasi-periodic oscillation model and deflection oscillation model. The oscillation model was mainly streamwise quasi-periodic oscillation model at L〈5H （where L was the nozzle separation and H was the nozzle slot height）, and it was mainly deflection oscillation model at L〉5H. The deflection oscillation model had a stable period which decreased with increasing normalized nozzle separation.

关 键 词：平面喷嘴 振荡特性 撞击流 烟线法 流场显示 

分 类 号：TQ021.1[化学工程]