Author : Prashanth Mohana Sundaram
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)
Book Synopsis The Effect of Clearance on Unshrouded Ceramic Matrix Composite High Pressure Turbine Blade at Two Different Solidities by : Prashanth Mohana Sundaram
Download or read book The Effect of Clearance on Unshrouded Ceramic Matrix Composite High Pressure Turbine Blade at Two Different Solidities written by Prashanth Mohana Sundaram and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical study was conducted to evaluate the effect of varying tip clearances on the aerodynamic performance of an unshrouded first stage high pressure turbine ceramic matrix composite rotor blade. The analysis was carried out for three values of clearances (1%, 2% and 3% of blade span). The inlet temperature, pressure and blade rotational speed used for the analysis were specified by NASA for a notional single aisle aircraft engine to be available in the N+3 time frame, beyond 2030. As a measure for aerodynamic performance, we evaluated the total pressure loss coefficient, blade row efficiency/stage efficiency and examined other flow characteristics around the blade. In addition, we also analyzed the effect of increase in blade count (increase in solidity) on the aerodynamic performance at different tip clearances. The efficiency varied linearly with clearances larger than 1% Span for both solidity cases. Moreover, by increasing the solidity, we found the separation on the suction side of the surface for the lower solidity case vanished. This translated to a ~1% increase in efficiency for the higher solidity case over the lower solidity. Pressure loss profiles vs blade span were also compared, providing insight into the flow dynamics of the different clearances for both solidity cases.