PIV Studies on Kaveri Fuel Injector: Phase I

Venkatakrishnan, L and Suriyanarayanan, P and Madhavan, KT (2007) PIV Studies on Kaveri Fuel Injector: Phase I. Project Report. National Aerospace Laboratories, Bangalore.

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A preliminary study to document the mean velocity field of the Kaveri engine fuel injector designed by Gas Turbine Research Establishment (GTRE) has been carried out using 2D PIV on a full-scale model of the injector for different exit conditions. The effect of variation of volume flow rate of water from 3.5lpm to 5.5lpm keeping the air-water mass flow ratio constant (unity) was examined. Further the effect of the presence of pintle for both cases was examined. All cases were compared against their equivalent baseline water-only case in order to estimate the effect of the air blast atomization. Flow visualization and 2D PIV studies were carried out to reveal cone angle, symmetry, axial velocity decay, radial velocity and growth characteristics. While Stereo PIV measurements were planned to be carried out, they could not be executed due to the high volume of water spray impinging on the cameras and thus endangering the sensitive electronic hardware. The visualization results show that the dispersion angle is not significantly affected by the volume flow rate of the liquid as long as the mass ratio is held constant, however volume flow rate has considerable effect on the mean velocity field. The presence of pintle introduces a significant swirl in the flow, thereby leading to much higher three-dimensionality, more pronounced for the higher flow rate condition. This results in non-uniformity of the velocity field which has higher radial velocities and lower axial velocities when compared to the no-pintle case. It is felt that a study of the air flow in addition to that of the spray is necessary to understand the flow physics more clearly.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Fuel sprays, two-phase flows, PIV flow measurements
Subjects: AERONAUTICS > Aerodynamics
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 20 Sep 2011 05:41
Last Modified: 20 Sep 2011 05:41
URI: http://nal-ir.nal.res.in/id/eprint/9959

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