Turbomachinery Blade Profile Design

Ramamurthy, S and Murugesan, K (1984) Turbomachinery Blade Profile Design. Technical Report. NAL, NAL Bangalore. (Submitted)

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Abstract

A theoretical method for the design of turbomachinery blade profile to obtain best performance has been demonstrated for its practical use.As an example a typical turbine blade profile based on conventional method of design was analyzed theoretically for surface velocity distribution, boundary layer growth and associated profile loss.The surface velocity distribution was obtained uisng singularity method based on Martensens's approach, assuming the flow to be two dimensional and incompressible.The boundary layer parameters are predicted using standard momentum integral and improved entrainment method.The theoretically estimated velocity distribution and profile loss are compared with experimentally measured values.The velocity distribution was reshaped to get better boundary layer growth and lower loss.By extending the Martensen's approach a theoretical method was developed to design the blade profile which will have the above reshaped velocity distribution.The newly designed profile was analyzed theoretically for the same fluid inlet angles for which the initial conventional profile was analyzed earlier.Both the profiles were compared to assess their performance.The designed profile was found to be better than conventional profile with respect to velocity distribution ,boundary layer growth and profile loss.

Item Type: Proj.Doc/Technical Report (Technical Report)
Subjects: AERONAUTICS > Aeronautics (General)
AERONAUTICS > Aircraft Propulsion and Power
Division/Department: Propulsion Division, Propulsion Division
Depositing User: Dr S Ramamurthy
Date Deposited: 23 Aug 2010 12:23
Last Modified: 23 Aug 2010 12:23
URI: http://nal-ir.nal.res.in/id/eprint/9006

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