Flow Distortion Studies in KAVERI Engine Inlet Duct for Intake-Engine Compatibility

Sankaranaryanan, S and Murugesan, K and Ramamurthy, S (1993) Flow Distortion Studies in KAVERI Engine Inlet Duct for Intake-Engine Compatibility. Project Report. NAL, NAL Bangalore.

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Abstract

A project work was sponsored by Aeronautical Development Agency,Bangalore,to generate and study the flow distortion in a straight duct with possible application to Kaveri engine intake duct.For this purpose, a 1/4 scale model of straight duct of the engine intake with screen/mesh combinations was fabricated and tested at the inlet of the centrifugal compressor in CLOCTER facility of N.A.L. Five meshes of different size and porosity ranging form 39% to 56% either in single or in combination mode were used to create a number of different distortion patterns at flow Mach numbers of 0.3 to 0.34.A total pressure rake of eight arms having 40 pressure tappings distributed in five equal area rings across the duct, was used to obtain the pressure distribution downstream of the mesh for estimating the pressure loss and total pressure contours.A software was developed to collect and reduce the online experimental data to required parametric forms for storing as characteristic of screen modules for later use in full scale engine tests.Pressure loss/Isobar contours were plotted for different values of IDC,IDCL & DC(60) and the maximum values of these coefficients are 9.99%,3.61% &0.27% respectively.From the created data bank,it has been observed that the isobar contours can be shifted to any selective location across the duct by suitable selection of mesh sizes and shapes.In other words, a methodology has been now developed to get a total pressure contour qualitatively across the duct for selected values of distortion coefficients.

Item Type: Proj.Doc/Technical Report (Project Report)
Subjects: AERONAUTICS > Aeronautics (General)
AERONAUTICS > Aircraft Propulsion and Power
Division/Department: Propulsion Division, Propulsion Division, Propulsion Division
Depositing User: Dr S Ramamurthy
Date Deposited: 25 Aug 2010 11:01
Last Modified: 25 Aug 2010 11:01
URI: http://nal-ir.nal.res.in/id/eprint/9020

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