Browse by author
Lookup NU author(s): Dr Roger William Moss
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
The composition of the time-resolved surface pressure field around a high-pressure rotor blade caused by the presence of neighboring blade rows is investigated, with the individual effects of wake, shock and potential field interaction being determined. Two test geometries are considered: first, a high-pressure turbine stage coupled with a swannecked diffuser exit duct: secondly, the same high-pressure stage but with a vane located in the downstream duct. Both tests were conducted at engine-representative Mach and Reynolds numbers, and experimental data was acquired using fast-response pressure transducers mounted on the mid-height streamline of the HP rotor blades. The results are compared to time-resolved computational predictions of the flowfield in order to aid interpretation of experimental results and to determine the accuracy with which the computation predicts blade interaction. The paper is split into two parts: the first investigating the effect of the upstream vane on the unsteady pressure field around the rotor (vane-rotor interaction), and the second investigating the effect of the downstream vane on the unsteady pressure field around the rotor (rotor-vane interaction). The paper shows that at typical design operating conditions shock interaction from the upstream blade row is an order of magnitude greater than wake interaction and that with the design vane-rotor inter-blade gap the presence of the rotor causes a periodic increase in the strength of the vane trailing edge shock. The presence of the potential field of the downstream vane is found to affect significantly the rotor pressure field downstream of the Mach one surface within each rotor passage.
Author(s): Miller RJ, Moss RW, Ainsworth RW, Harvey NW
Publication type: Article
Publication status: Published
Journal: Journal of Turbomachinery
Year: 2003
Volume: 125
Issue: 1
Pages: 33-39
Print publication date: 01/01/2003
ISSN (print): 0889-504X
ISSN (electronic): 1528-8900
Publisher: ASME International
URL: http://dx.doi.org/10.1115/1.1508386
DOI: 10.1115/1.1508386
Altmetrics provided by Altmetric
