Effective of Passive Devices in Alleviation of Flow-induced oscillations of he nozzles of a Multi-Booster Launch vehicle

Suryanarayana, GK and Nagarajan, V (2011) Effective of Passive Devices in Alleviation of Flow-induced oscillations of he nozzles of a Multi-Booster Launch vehicle. In: Symposium on Applied Aerodynamics and Design of Aerospace Vehicle (SAROD 2011)), 16-18 November 2011, Bangalore.

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Abstract

Wind tunnel tests to quantify the flow induced oscillations of nozzles of strap-on boosters of a typical launch vehicle have been performed under jet-off conditions in the Mach number range 0.8 to 2.5. The effects of gymballing the nozzles on the steady and unsteady radial and tangential moments acting at the simulated position of gymbal actuators have been studied. The loads are seen to increase as the gymbal angle increases. The effectiveness of various load alleviating passive devices in reducing steady and unsteady loads was evaluated. The most effective device was found to be a semi-circular segment. The spectra of unsteady moments indicate that the loads alleviating devices do not significantly alter the magnitude as compared to that of the baseline data.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Flow induced oscillations, Fluid-structure interactions, Unsteady aerodynamics
Subjects: ASTRONAUTICS > Astrodynamics
Depositing User: Users 10 not found.
Date Deposited: 07 Dec 2011 07:59
Last Modified: 07 Dec 2011 07:59
URI: http://nal-ir.nal.res.in/id/eprint/10112

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