导流叶片宽度对预旋系统性能影响的数值研究法

为研究导流叶片结构尺寸对盘腔预旋性能的影响,采用RNG k-ε模型对导流叶片无量纲宽度为0、0.1、0.2、0.4、0.6、0.8和1.0的预旋系统在不同旋转雷诺数工况下进行了数值研究.结果表明:导流叶片能够提高喷嘴压比和温降系数,旋转雷诺数越大,提高的幅度越大;旋转雷诺数较大时,喷嘴压比和温降系数随导流叶片无量纲宽度增大而增大,无量纲宽度超过0.6后,趋于平稳.当导流叶片无量纲宽度在0~0.2范围内,总压损失系数随导流叶片无量纲宽度的增大而增大;当导流叶片无量纲宽度大于0.2时,总压损失系数随导流叶片无量纲宽度的增大基本不发生变化.

Numerical Study on Influence of Width of Guide Vane on Performance of Pre-Swirl System

In order to investigate the influence of the size of the guide vane on the performance of pre-swirl system, the RNG model was used to study the non-dimensional width of the guide vane which is equal to 0、0.1、0.2、0.4、0.6、0.8 and 1.0 under different rotating Reynolds number. The results show that the nozzle pressure ratio and temperature drop coefficient of the pre-swirl system can be enhanced by the guide vane, the magnitude of increase is higher with increase of the rotating Reynolds number; the nozzle pressure ratio and the temperature drop coefficient increase with the increase of the width of the guide vane at the high rotating Reynolds number,and when the dimensionless width of the guide vane is more than 0.6, it tends to be stable. When the dimensionless width of the guide vane is in the range of 0 to 0.2,the total pressure loss coefficient continually increase with the increase of the dimensionless width of the guide vane, and it is almost unchanged when the guide vane non-dimensional width is increased from 0.2 to 1.0.