论文部分内容阅读
为了获得较好的可控涡扩压器性能,采用可实现k-ε两方程湍流模型及引气口流量出口条件对不同结构的扩压器流场进行了数值模拟。仅有单侧轴向开口或单侧径向开口时,随着引气口尺寸的增加,扩压器出口平均静压值和平均滞止压力减小,扩压效率也减小。比较了不同开口方式及尺寸对流场的影响,研究发现最优开口组合的扩压性能比单侧径向最优开口的要好,但比单侧轴向最优开口的要差;有开口的扩压性能比无开口的要好。
In order to obtain a better controllable vortex diffuser performance, the numerical simulation of the diffuser flow field with different structures can be realized by using the k-ε turbulence model and the outlet flow of the air outlet. With only one-sided axial opening or one-sided radial opening, as the size of the air inlet increases, the average static pressure value at the outlet of the diffuser and the average stagnation pressure decrease, and the diffuser efficiency also decreases. The influence of different opening ways and sizes on the flow field is compared. It is found that the optimal opening combination has better diffusing performance than single-side radial optimal opening, but worse than unilateral axial optimal opening. Diffusion performance better than no openings.