【作者】 夏子龙； 王锁芳； 陆海鹰； 孙平平；

【Author】 Xia Zilong;Wang Suofang;Lu Haiying;Sun Pingping;Collage of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics;Department of Heat Transfer on Internal Thermal Flow,Shenyang Aeroengine Research Institute,Aviation Industry Corporation of China;

【机构】 南京航空航天大学能源与动力学院； 中国航空工业集团公司沈阳发动机设计研究所内流传热室；

【摘要】 为研究去旋喷嘴对对转盘腔中流动与压力损失特性的影响规律,对外围屏带去旋喷嘴的对转盘腔进行了数值模拟研究,结果表明:去旋对转盘腔内流场呈现出典型的4分区结构。去旋喷嘴轴向安装位置和去旋喷嘴个数对盘腔和喷嘴内的压力损失影响很小,均随旋转雷诺数的增加而降低并趋于平稳;去旋角度越小,盘腔内的压力损失越小;当无量纲质量流量较大时,喷嘴强射流作用会降低盘腔内喷嘴附近相对切向速度分布。盘腔内压力损失随无量纲流量增加呈现出"S"型曲线变化。在所有数值模拟结果中,喷嘴内压力损失总是比盘腔中大很多。更多还原

【Abstract】 In order to study the flow and pressure loss characteristics of de-swirl nozzle in the contrarotating cavity,numerical study in a contra-rotating cavity with radial de-swirl inflow from the outer periphery was presented.The results indicated that:a typical 4-zoom flow structure can be found inside the deswirled contra-rotating cavity.The axial location and the number of de-swirl nozzles have slight effect on pressure loss in both cavity and the nozzle,which all decreases with the increasing of rotational Reynolds number and tends to be stable.Pressure loss inside the cavity decreases with de-swirl angle increases.The strong injection of nozzle in large non-dimensional mass flow rate will decrease the relative tangential velocity distribution near the nozzle location.The pressure drop inside the cavity exhibits " S" curve variation with the increase of non-dimensional mass flow rate.In all the situations,the pressure losses in the de-swirl nozzle are always much greater than that in the cavity.更多还原