Numerical Investigation of Heat Transfer Characteristics of Nozzle Ribs in a Gas Turbine Blade

Bhat, Chandrashekhar and Deepak, P D and Ramakumar, B V N and Jagannath, K and Sharma , S S and Kini, Achutha U (2013) Numerical Investigation of Heat Transfer Characteristics of Nozzle Ribs in a Gas Turbine Blade. International Journal of Research in Engineering and Technology (IJRET), 2 (5). pp. 209-217. ISSN 2277 – 4378

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A new type of rib is proposed for the cooling channel in a gas turbine blade. 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 haracteristics over the conventional 450 ribs. A series of simulations were carried out on the optimized configuration of the nozzle ribs for a Reynolds number of 10,000, 20,000 and 30,000 by varying the rotation number from 0 to 0.3 with an interval of 0.1. The results of heat transfer characteristics for each simulation is presented

Item Type: Article
Uncontrolled Keywords: Gas Turbine, Nozzle, Nusselt Number, Thermal, Performance Parameter
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 16 Oct 2013 10:48
Last Modified: 16 Oct 2013 10:48

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