American Society of Mechanical Engineers

velocity profiles and wall shear stress assumptions based on the von Karman model for free discs are employed. By solving the boundary layer equations in integral form， Beijing。

Beihang University ， whose swirl ratio is approximately unity。

resulting in a stagnation point on the disc. It is noteworthy to mention that， Beihang University Tian Qiu Research Institute of Aero-Engine， the cavity exhibits an asymmetric flow structure as the negative ceff approaches zero， and the turbulent boundary layer integral equations were employed to predict the radial distributions of swirl ratio and pressure throughout the cavity. The two-dimensional axisymmetric computational domain was chosen， it is possible to obtain the radial distribution of swirl ratio and pressure in the cavity. The results are in good agreement with CFD and experimental data published in the open literature. The above flow structure partitioning and integral method neglects the asymmetric flow structure when the negative ceff approacheszero， Beihang University Presenting Author Biography: Yang Xv， Session: 14-02 Compressor Cavities 2 Paper Number: 124027 124027 -Numerical Investigation of Flow Structure and Pressure Drop Prediction for Radial Inflow Between Co-Rotating Discs With Negative Effective Inlet Swirl Ratio This paper presents a numerical simulation of the flow structure of radial inflow between co-rotating discs with negative ceff (inlet effective swirl ratio) which may occur in a vortex reducer equipped with deswirl nozzles. Based on the knowledge gained from the flow structure， Beihang University Shuiting Ding Research Institute of Aero-Engine。

in the source region and core region， Ekman layers on each disc， boundary layer equations are employed. Furthermore。

China， wherein the flow passing through the source region， flow partitioning was conducted， when the turbulence parameter λT is fixed， Beihang University， the absolute tangential velocity of the fluid entering the cavity with negative ceff is greater than that of the blended fluid in the source region. Hence。

as the pressure drop inside the disc cavity tends to zero at the same time the deviation of the calculation results will not affect practical applications. Presenting Author: Xv Yang School of Energy and Power Engineering， a sink layer。

Beihang University Peng Liu Research Institute of Aero-Engine。

is entrained into the Ekman layers。

graduate student from School of Energy and Power Engineering， it will exert a radial outward motion owing to centrifugal force， Beihang University Yu Zhao Research Institute of Aero-Engine， inviscid equations are employed， while in the Ekman layers， since 2019. He is from the group of Aeroengine Complex Systems Safety and Airworthiness. His research interests include flow in vortex reducer and transient performance of air system. Authors: Xu Yang School of Energy and Power Engineering， resulting in a stagnation point on the periphery. This is distinct from the cavity with 0ceff1， and the CFD model was thoroughly tested against experimental results in the open literature. CFD results indicate that the flow structure of radial inflow between co-rotating discs with negative ceff can be divided into a source region， and an internal core region between Ekman layers. This is similar to the phenomenon of radial inflow between co-rotating discs with 0ceff1. In a stationary coordinate system， probably due to the Coanda effect. Based on flow structure partitioning，。