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HEAT TRANSFER AND FLOW TESTING IN ENGINE HP TURBINE COOLING SYSTEM DEVELOPMENT

DOI: 10.1615/ICHMT.2009.HeatTransfGasTurbSyst.420
16 pages

Peter T. Ireland
Department of Engineering Science and St. Anne's College, University of Oxford, England.

Vikram Mittal
Vehicles and Robotics Group, C.S. Draper Laboratory, 550 Technology Sq, MS20, Cambridge, MA 02139 USA

Howoong Namgoon
Turbines SCU, Rolls-Royce plc, Moor Lane, PO box 32, Derby. DE24 8BJ, UK

Dougal Jackson
Turbines SCU, Rolls-Royce plc, Moor Lane, PO box 32, Derby. DE24 8BJ, UK

要約

The speed with which a new aircraft engine is developed prevents extensive experimental testing of key turbine components. For this reason, design engineers rely increasingly on computer simulations to develop and perfect components before committing to final designs. CFD predictions can fail to accurately predict some key features of turbomachinery flows and design engineers often seek to calibrate their designs and CFD predictions against test data. This paper addresses the use of flow and heat transfer experiments in the context of turbine cooling system development. It reviews how experiments can be used to support both research activity and the engine development programme (EDP). The paper describes the state of the art in perspex model test technology and shows how rapid prototyping (RP) methods are starting to be used in the EDP. The paper reports applications of these models to aerothermal testing of turbine components. The paper focuses on the stereo-lithography (SL) technique as this remains the most popular rapid prototyping method for aero-thermal tests. The paper also explains how judicious use of RP test data can be used in cooling system development to arrive at optimal systems.

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