A novel free floating accelerometer force balance system for shock tunnel applications

Joarder, R and Jagadeesh, G and Mahaptra, DR (2005) A novel free floating accelerometer force balance system for shock tunnel applications. In: Shock Waves, 1-2 (Part 3). pp. 407-412.

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Abstract

In order to overcome the interference of the model mounting system with the external aerodynamics of the body during shock tunnel testing, a new free floating internally mountable balance system that ensures unrestrained model motion during testing has been designed, fabricated and tested. Minimal friction ball bearings are used for ensuring the free floating condition of the model during tunnel testing. The drag force acting on a blunt leading edge flat plate at hypersonic Mach number has been measured using the new balance system. Finite element model (FEM) and CFD are exhaustively used in the design as well as for calibrating the new balance system. The experimentally measured drag force on the blunt leading edge flat plate at stagnation enthalpy of 0.7 and 1.2 MJ/kg and nominal Mach number of 5.75 matches well with FEM results. The concept can also be extended for measuring all the three fundamental aerodynamic forces in short duration test facilities like free piston driven shock tunnels.

Item Type:	Journal Article
Publication:	Shock Waves
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	08 Mar 2012 09:17
Last Modified:	08 Mar 2012 09:17
URI:	http://eprints.iisc.ac.in/id/eprint/43744

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