中文摘要：

为了研究液氧煤油发动机尾焰冲击导流槽的流场规律,采用CFD软件计算了液氧煤油发动机尾焰对无导流装置、有锲形导流装置和有圆锥体导流装置三种不同导流槽的冲击流场进行了三维数值模拟,对比分析了冲击不同导流槽的尾焰燃气流动。结果表明：液氧煤油发动机尾焰燃气垂直冲击无导流装置的导流槽,沿着导流槽侧面流动和向上反射的燃气会对导流槽底面正上方环境产生高温影响;锲形导流装置能够避免沿着导流槽侧面流动和向上反射的燃气对导流槽底面正上方环境的高温影响;圆锥体导流装置能够避免向上反射的燃气对导流槽底面正上方环境的高温影响,在避免燃气沿着导流槽侧面流动方面仍有改进余地;相对尾焰燃气冲击无导流装置的导流槽,锲形导流装置和圆锥体导流装置表面最大压力分别增大了10.31%和33.81%,锲形导流装置和圆锥体导流装置受尾焰燃气冲击的最高温度分别降低了4.04%和8.95%。

英文摘要：

Aimed at studying the flow characteristics of LOX/kerosene engine exhaust plume impinging on the diversion trough, three-dimension flow fields of LOX/kerosene engine exhaust plume impinging on three diversion troughs of without deflector, with a wedge deflector, with a conical deflector were calculated with the CFD software, and flow fields of plume impinging on different diversion troughs were compared and analyzed. It is found that, after LOX/kerosene engine exhaust plume vertically impacting on the diversion trough without deflector, plume which flows along the side surface of the diversion through and plume reflected upward would bring high temperature effect on the environment directly above the diversion trough. The wedge deflector would avoid the high temperature effect of plume on the environment directly above the diversion trough, while the conical deflector only could avoid the high temperature effect of plume reflected upward, there was still room for improving avoiding plume flowing along the side surface of the diversion trough. Compared with the plume impact on the diversion trough without deflector, the maximum pressure of the wedge deflector and the conical deflector respectively increase 10.31% and 33.81%, the plume impact maximum temperature of the wedge deflector and the conical deflector respectively decrease 4.04%and 8.95%.