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Design and Performance Investigations of Transonic Turbine Rotor Cascades

Kondareddypally Nanjundappa, Abhishek (2008) Design and Performance Investigations of Transonic Turbine Rotor Cascades. Master's, Institut für Antriebstechnikk.

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The main focus of the thesis work is to investigate the performance and suitable design improvements of a transonic turbine rotor cascade. The Bezier parametric curve is used to represent the geometric blade definition. The semianalytical algorithm is developed to determine the control points of the Bezier curve which can reproduce the initial shape accurately with a minimum number of control points. The numerical flow field simulations are carried out using a cascade analysis code - MISES. The computational method - MISES has quite a good agreement with the experimental results. Two fold intuitive design change were employed namely curvature change along the rear part of suction side and reduction of trailing edge radius for the VKI-1 profile. Flow field simulations were carried out for four different profiles. The losses for profile-1, with trailing edge radius same as VKI-1 are reduced to about 2.5% for supersonic Mach number and shows a slight increase for Mach numbers 0.8 and 1.0. For profiles with reduced trailing edge radii, the losses are reduced around 3% for Mach numbers 0.8 and 1.0 and around 1% for Mach number 1.2 between the final and initial profile.

Item URL in elib:https://elib.dlr.de/83091/
Document Type:Thesis (Master's)
Title:Design and Performance Investigations of Transonic Turbine Rotor Cascades
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:28 February 2008
Refereed publication:No
Open Access:No
Keywords:Bezier curves, blade generation, computaional fluid dynamics, MISES
Institution:Institut für Antriebstechnikk
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Giess, Dr.-Ing. Peter-Anton
Deposited On:25 Jun 2013 15:00
Last Modified:25 Jun 2013 15:00

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