Impact of Unsteady Wakes on the Secondary Flows of a High-Speed Low-Pressure Turbine Cascade-Reference-Cited by-同舟云学术

Impact of Unsteady Wakes on the Secondary Flows of a High-Speed Low-Pressure Turbine Cascade

Published:2023-09-22 Issue:4 Volume:8 Page:36
ISSN:2504-186X
Container-title:International Journal of Turbomachinery, Propulsion and Power
language:en
Short-container-title:IJTPP

Author:

Lopes Gustavo¹²^ORCID,Simonassi Loris¹,Lavagnoli Sergio¹^ORCID

Affiliation:

1. Turbomachinery and Propulsion Department, von Kàrmàn Institute for Fluid Dynamics, Chaussée de Waterloo 72, 1640 Rhode-St-Genèse, Belgium

2. Departement of Aerospace & Mechanical Engineering, University of Liège, Allée de la Découverte 9, 4000 Liège, Belgium

Abstract

The aerodynamics of a high-speed low-pressure turbine (LPT) cascade were investigated under steady and unsteady inlet flows. The tests were performed at outlet Mach (M) and Reynolds numbers (Re) of 0.90 and 70k, respectively. Unsteady wakes were simulated by means of a wake generator equipped with bars. A bar reduced frequency (f+) of ∼0.95 was used for the unsteady case. The inlet flow field was characterized in terms of the total pressure profile and incidence. The blade aerodynamics at midspan and the secondary flow region were investigated by means of pneumatic taps and hot-film sensors. The latter provided a novel view into the impact of the secondary flows on the heat transfer topology on the blade suction side (SS). The cascade performance was quantified in terms of the outlet flow angle and losses by means of a directional multi-hole probe. The results report the phase-averaged impact of unsteady wakes on the secondary flow structures in an open test case high-speed LPT geometry.

Funder

Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation program

Publisher

MDPI AG

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering

Link

https://www.mdpi.com/2504-186X/8/4/36/pdf

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