小叶片弦长对跨声轴流风扇气动性能的影响

基金项目: 国家863基金(863-2-1-3-1)

Investigation of the influence of splitter chord length on the transonic axial fan rotor

Institute of Propulsion Theory and Technology, Harbin Institute of Technology, Harbin 150001, China

摘要: 针对某型跨声轴流风扇大小叶片转子,通过优化去除小叶片中弧线形状的影响,对比分析了最高效率点工况下小叶片弦长对转子气动性能的影响.发现小叶片前缘膨胀波可以调整大叶片壁面附面层逆压力梯度段的长度和逆压梯度的强度.正确选择小叶片前缘位置可以降低附面层损失,抑制大叶片后部分离,合理分配气动负荷.
- 航空、航天推进系统 /
- 轴流跨声风扇 /
- 大小叶片 /
- 弦长 /
- 激波
Abstract: An axial transonic fan with splitter was designed.An optimization method was used to eliminate the influence of the splitter camber shape.The effect of splitter chord length on the aerodynamic performance of the fan rotor was analyzed under the maximum efficiency condition.The results show that the leading edge expanding wave can adjust the length of the main blade boundary layer negative gradient and its strength.Correctly selecting the splitter leading edge position can reduce the boundary loss,control the separation at the rear part of the main blade and produce optimal aerodynamic load distribution.
- aerospace propulsion system /
- axial transonic fan /
- splitter /
- chord length /
- shock wave

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