Publications

Non-Axisymmetric Stator Design for Boundary Layer Ingesting Fans

Authors:

Gunn, E. J.; Hall, C. A.

Publication:

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2017, VOL 1

DOI:

10.1115/GT2017-63082

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Angular response of hot wire probes

Authors:

L. di Mare, T. O. Jelly and I. J. Day

Publication:

Measurement Science and Technology

DOI:

10.1088/1361-6501/aa5014

Accounting for Eccentricity in Compressor Design

Authors:

Young, A. M., Cao, T., Day, I. and Longley, J.

Publication:

ASME Journal of Turbomachinery

DOI:

10.1115/1.4036201

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Fan–Intake Interaction Under High Incidence

In this paper, we present an extensive numerical study on the interaction between the downstream fan and the flow separating over an intake under high incidence. The objectives of this investigation are twofold: (a) to gain qualitative insight into the mechanism of fan–intake interaction and (b) to quantitatively examine the effect of the proximity of the fan on the inlet distortion. The fan proximity is altered using the key design parameter, L/D, where D is the diameter of the intake, and L is the distance of the fan from the intake lip. Both steady and unsteady Reynolds-averaged numerical simulations (RANS) were carried out. For the steady calculations, a low-order fan model has been used, while a full 3D geometry has been used for the unsteady RANS. The numerical methodology is also thoroughly validated against the measurements for the intake-only and fan-only configurations on a high bypass ratio turbofan intake and fan, respectively. To systematically study the effect of fan on t

Authors:

Teng Cao , Nagabhushana Rao Vadlamani , Paul G. Tucker , Angus R. Smith , Michal Slaby , Christopher

Publication:

Journal of Engineering Gas for Turbines and Power

DOI:

https://doi.org/10.1115/1.4034701

A one-dimensional model for tidal array design based on three-scale dynamics

Authors:

Gupta, V. and Young, A. M.

Publication:

Journal of Fluid Mechanics

DOI:

https://doi.org/10.1017/jfm.2017.399

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The Effect of Rotor Casing on Low-Pressure Steam Turbine and Diffuser Interactions

The present study aims to investigate the interaction between a last-stage steam turbine blade row and diffuser. This work is carried out using computational fluid dynamics (CFD) simulations of a generic last-stage low-pressure (LP) turbine and axial–radial exhaust diffuser attached to it. In order to determine the validity of the computational method, the CFD predictions are first compared with data obtained from an experimental test facility. A computational study is then performed for different design configurations of the diffuser and rotor casing shapes. The study focuses on typical flow features such as effects of rotor tip leakage flows and subsequent changes in the rotor–diffuser interactions. The results suggest that the rotor casing shape influences the rotor work extraction capability and yields significant improvements in the diffuser static pressure recovery.

Authors:

Gursharanjit Singh, Andrew P. S. Wheeler and Gurnam Singh

Publication:

Journal of Engineering for Gas Turbines and Power

DOI:

10.1115/1.4034417

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Stall, Surge, and 75 Years of Research

Work on rotating stall and its related disturbances have been in progress since the Second World War. During this period, certain "hot topics" have come to the fore-mostly in response to pressing problems associated with new engine designs. This paper will take a semihistorical look at some of these fields of study (stall, surge, active control, rotating instabilities, etc.) and will examine the ideas which underpin each topic. Good progress can be reported, but the paper will not be an unrestricted celebration of our successes because, after 75 years of research, we are still unable to predict the stalling behavior of a new compressor or to contribute much to the design of a more stall-resistant machine. Looking forward from where we are today, it is clear that future developments will come from CFD in the form of better performance predictions, better flow modeling, and improved interpretation of experimental results. It is also clear that future experimental work will be most effect

Authors:

Day, IJ

Publication:

Journal of Turbomachinery

DOI:

10.1115/1.4031473

Modeling Nonuniform Bleed in Axial Compressors

Authors:

S.D. Grimshaw, G. Pullan, T.P. Hynes

Publication:

Journal of Turbomachinery (2016) Vol. 138, Issue 9, Article 091010

DOI:

10.1115/1.4032845

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Bleed Induced Distortion in Axial Compressors

Authors:

S. D. Grimshaw, G. Pullan, T. Walker

Publication:

Journal of Turbomachinery (2015) Vol. 137, Issue 9, Article 101009

DOI:

10.1115/1.4030809

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Novel usage of five-hole probes: Tidal channel turbulence measurements

Authors:

Young, A., Guion, R., Atkins, N. and Costan, J.,

Publication:

In proceedings of the XXIII Biannual Symposium on Measurement Techniques in Turbomachinery