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航空发动机空气系统引气腔是典型的径向进气轴向出流的旋转盘腔,研究引气腔内流动换热特性,尤其是离心力和哥氏力综合作用下的流动换热规律,对提高空气系统引气品质,优化空气系统设计有重要意义。研究发现:旋转雷诺数和流量系数是引气腔流场的主要影响因素,流体切向速度随旋转雷诺数的增加而增加,随流量系数的增加而减少,并沿半径的减小而增大;引气腔的总压损失随旋转雷诺数的增加而增加,随流量系数的变化规律较复杂,在较小旋转雷诺数下,总压损失随流量系数的增加而增加,在较大旋转雷诺数下,总压损失随流量系数的增加先减小后增加;引气腔的平均努赛尔特数随着旋转雷诺数和流量系数的增加而提高,平均换热效果增强。
Aeroengine air system air-entraining chamber is a typical radial inlet axial outflow rotating disk chamber, studying the heat transfer characteristics of air entraining chamber, especially the centrifugal heat and Coriolis force under the combined action of heat transfer, the right Improve the air system bleed air quality, optimize the air system design is of great significance. The results show that the rotational Reynolds number and the flow coefficient are the main influencing factors of the flow field in the bleed cavity. The tangential velocity of the fluid increases with the increase of the rotational Reynolds number, decreases with the increase of the flow coefficient, and increases with decreasing radius ; The total pressure loss of the air-entraining chamber increases with the increase of the rotating Reynolds number, and the variation law with the flow coefficient is more complicated. Under the small rotating Reynolds number, the total pressure loss increases with the increase of the flow coefficient, The total pressure loss increases first and then increases with the increase of the flow coefficient. The average Nusselt number of the air induction chamber increases with the increase of the rotational Reynolds number and the flow coefficient, and the average heat transfer enhancement increases.