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Design and Analysis of Nozzle Ribs in a Gas Turbine

Bhat, Chandrashekhar and Deepak, P D and Ramakumar, B V N and Jagannath, K and Sharma , S S and Kini, Achutha U (2013) Design and Analysis of Nozzle Ribs in a Gas Turbine. In: 3rd International Conference on Mechanical, Automotive and Materials Engineering (ICMAME'2013), April 29-30, 2013 , Singapore.

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Abstract

Single pass cooling channel in a gas turbine blade is being designed using a new type of rib called nozzle rib, both in shape and configuration. These ribs facilitate the tripping of boundary layer creating turbulence in the flow. Heat transfer characteristics of these ribs are evaluated through numerical investigation. The new nozzle ribs are a heat transfer augmentation component, which creates jets, and increase the velocity of the fluid. The investigation was conducted on rectangular channel of aspect ratio (AR) =4:1 with rib height to hydraulic diameter ratio (e/ Dh) of 0.1 and rib pitch to height ratio (P/e) of 5 and 10 at Re=30,000 for different configuration of nozzle ribs. Fluid flow simulation results of stationery case for different configuration are presented in terms of thermal performance parameters, Nusselt number and friction factor. These parameters indicate that a particular configuration of nozzle ribs provides better heat transfer characteristics over the conventional 450 ribs.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Gas Turbine, Nozzle, Nusselt Number, Thermal; Performance Parameter.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 11 May 2013 09:38
Last Modified: 11 May 2013 09:38
URI: http://eprints.manipal.edu/id/eprint/95009

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