Development of a Novel Shadowgraph Technique for Unsteady Flow Phenomena Studies in a Pulsejet Engine

Rajashekar, C and Baburajan, T and Raghukumar, HS and Bhaskaran, M and Isaac, JJ (2012) Development of a Novel Shadowgraph Technique for Unsteady Flow Phenomena Studies in a Pulsejet Engine. Documentation. National Aerospace Laboratroies, India. (Unpublished)

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Abstract

A novel shadowgraph flow visualisation technique has been developed and used to visualise key regions of a pulsejet flow field which are spatially separated. Schlieren and shadowgraph techniques are ideal flow visualisation techniques that can be used where large density gradients exist in a flow field. Conventional Schlieren and shadowgraph arrangements use a pair of collimating mirrors along with the light source and the knife edge. The present technique has the advantage of using four mirrors of the same focal lengths and overcomes the shortcoming of the requirement of a large diameter collimating mirror for covering the flow field which is either large in size or separated by a distance. The technique developed has been effectively demonstrated in capturing the unsteady flow field in a valveless pulsejet engine

Item Type: Proj.Doc/Technical Report (Documentation)
Uncontrolled Keywords: Pulsejet, Schlieren, Shadowgraph, Resonance, High speed photography
Subjects: AERONAUTICS > Aircraft Propulsion and Power
Division/Department: Propulsion Division, National Trisonic Aerodynamic Facility, Propulsion Division, Propulsion Division, Propulsion Division
Depositing User: Scientist C RAJASHEKAR
Date Deposited: 27 Feb 2012 13:53
Last Modified: 16 Mar 2012 10:25
URI: http://nal-ir.nal.res.in/id/eprint/10355

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