论文部分内容阅读
基于CFD技术,对波瓣尾缘斜切的波瓣喷管混合器在不同涵道比和斜切角度下的三维流场进行了数值研究。研究结果表明:斜切波瓣混合器减轻其自身重量的同时综合性能略有提高。波瓣尾缘斜切使流向涡产生位置提前,并且流向涡强度在各个涵道比下均高于常规波瓣混合器,平均在25%以上;斜切波瓣混合器较常规波瓣混合器的混合效率提高了2.45%,且随斜切角度和涵道比的增加而增大,混合管出口流体温度沿径向更平坦。在本文的内涵道比和斜切角度变化范围内,总压恢复系数高达0.935以上,而斜切对总压恢复系数的影响极其微弱,在±0.1%范围内。
Based on the CFD technique, the three-dimensional flow field of a lobed nozzle mixer chamfered at the trailing edge of a lobe is numerically studied under different tunneling and chamfering angles. The results show that the bevel lobe mixer reduces its own weight while improving the overall performance slightly. Bevel trailing edge beveled the flow vortex to advance position, and the vortex intensity was higher than that of the conventional lobe mixer at an average of more than 25% at each bypass ratio. The bevel lobe mixer was more efficient than the conventional lobe mixer The mixing efficiency increased by 2.45%, and with the increase of the chamfer angle and the increase of the bypass ratio, the outlet temperature of the mixing tube was more flat along the radial direction. The total pressure recovery coefficient is up to 0.935 in the range of the converse ratio and the bevel angle, while the influence of the bevel on the total pressure recovery coefficient is extremely weak, within ± 0.1%.