【摘要】 为了探索翅片-管复合式减涡器盘腔内径向内流总压损失及温降特性的分布规律,对简单盘腔、管式减涡器、翅片-管复合式减涡器3种模型在不同转速、不同工况下的流场结构、总压损失分布规律及温降系数进行了数值模拟。结果表明:翅片-管复合式减涡器能明显减小盘腔内的旋流比,提高气流径向引气效果,从而提高引气品质,其温降效果和减阻性能均优于管式减涡器和简单盘腔的。管式减涡器与简单盘腔相比,其温降效果提高约54.3%,减阻效果提高约64%;翅片-管复合式减涡器与管式减涡器相比,其温降效果提高约3%,减阻效果提高约40%。翅片-管复合式减涡器的整体性能最优,具有较高的工程应用价值,其研究结果对压气机二次空气系统设计具有一定的指导意义。更多还原

【Abstract】 In order to explore the distribution law of total pressure loss and temperature drop characteristics of radial inflow in the cavity of fins and tube compound vortex reducer,the flow field structure,total pressure loss distribution law and temperature drop coefficient of simple co-rotating cavity,tubular vortex reducer and fins and tube compound vortex reducer were numerically simulated under different rotational speeds and working conditions. The results show that the fins and tube compound vortex reducer can significantly reduce the swirl ratio in the cavity,improve the radial venting and the air entrainment quality. The temperature drop and drag reduction performance of fins and tube compound vortex reducer are better than that of tubular vortex reducer and simple co-rotating cavity. Compared with the simple co-rotating cavity,the temperature drop effect of tubular vortex reducer is increased by about 54.3%,and the drag reduction effect is increased by about 64%. The temperature drop effect of fins and tube compound vortex reducer is about 3% higher than that of tube vortex reducer,and the drag reduction effect of fins and tube compound vortex reducer is about 40% higher than that of tubular vortex reducer. The fins and tube compound vortex reducer has the best overall performance and high engineering application value. The research results have certain guiding significance for the design of compressor secondary air system.更多还原