[+] Author and Article Information
Simeng Tian

Körsbärsvägen 4C Stockholm, 11422 Sweden siment@kth.se

Paul Petrie-Repar

Brinellvägen 68 Stockholm, 10044 Sweden paul.petrie-repar@energy.kth.se

Nenad Glodic

Brinellvägen 68 Stockholm, 10044 Sweden Nenad.Glodic@energy.kth.se

Tianrui Sun

Beihang University, Xueyuan Road 37#, Haidian District Beijing, Beijing 100191 China mengzhuanjingshi@yeah.net

1Corresponding author.

Manuscript received November 30, 2018; final manuscript received May 10, 2019; published online xx xx, xxxx. Assoc. Editor: Li He.

ASME doi:10.1115/1.4043884 History: Received November 30, 2018; Accepted May 10, 2019


This paper presents the results of CFD aided design calculations of a transonic linear cascade wind tunnel. The purpose of the wind tunnel is to generate data for the validation of numerical methods employed to calculate aerodynamic damping for forced response cases in transonic compressors. It is common for transonic wind tunnels to use transonic walls (perforated walls with controlled suction) to adjust the transonic flow in the experiment. Unfortunately, transonic walls are difficult to model in CFD simulations, and they complicate the validation process. One of the goals of the new tunnel is not to use transonic walls. The main difficulty in the design of a transonic linear cascade is achieving periodic flow for the central blades due to shock reflections from the side walls and the sensitivity of transonic flow to small changes in geometry. Other design constraints are the maximum available mass flow of 4.5 kg/s and the minimum required blade thickness of 2 mm for instrumentation. The purpose of the current CFD simulations is to determine the optimum geometry (sidewalls, tailboards, and throttle) of the tunnel with the goal of achieving near periodic flow conditions for the central blade channels at the similar condition in a typical transonic compressor.

Copyright © 2019 by ASME
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