大预旋下离心压缩机进口结构与导叶掠角的改进研究

发布时间：2018-05-01 11:27

本文选题：离心压缩机 + 进口导叶　；参考：《西安交通大学学报》2017年11期

【摘要】：为了解决大预旋下进口导叶诱发流动损失而降低进口预旋调节经济性的问题,将原进口导叶截面中前缘掠角改为相对顶端型线呈前掠,同时将传统衔接进口导叶处进气管道的顶端形状改为锥面。改进结构下进口导叶内部的二次流克服了大预旋下离心力引发的进口轮盘侧的大规模分离状况,改善了叶轮进口段的熵增情况。预旋角分别为+60°、-60°时,改进结构在宽流量范围内可以有效提升离心压缩机多变效率和总压比性能,提升幅值随流量的增大而升高;在工况范围左边界基本保持不变的情况下,改进结构对大预旋下压缩机工况范围右边界的扩展效果明显。该结果表明,改进结构可以有效提升大预旋下压缩机的性能,具有良好的应用前景及推广潜力。
[Abstract]:In order to solve the problem of flow loss induced by inlet guide vane under large prerotation and reduce the economy of inlet prerotation regulation, the swept angle of the front edge of the section of the original inlet guide vane is changed to forward swept relative to the top shape line. At the same time, the top shape of the inlet pipe at the traditional connecting inlet vane is changed to the cone. Under the improved structure, the secondary flow inside the inlet guide vanes overcomes the large-scale separation of the inlet wheel side caused by the centrifugal force under large prerotation, and improves the entropy increase in the inlet section of the impeller. When the prerotation angle is 60 掳-60 掳, the improved structure can effectively enhance the variable efficiency and the total pressure ratio performance of centrifugal compressor in a wide flow range, and the lifting amplitude increases with the increase of flow rate, while the left boundary of the operating range is basically unchanged. The expansion effect of the improved structure on the right boundary of the compressor operating range under large prerotation is obvious. The results show that the improved structure can effectively improve the performance of the compressor under large pre-rotation, and has a good application prospect and popularization potential.
【作者单位】：西安交通大学能源与动力工程学院;
【基金】：国家自然科学基金项目资助(51236006,51576153)
【分类号】：TH452

【相似文献】