Method for static divergence analysis of sting-mounted wind tunnel models

Sundaramurthy, H (2005) Method for static divergence analysis of sting-mounted wind tunnel models. Technical Report. National Aerospace laboratories, Bangalore, India.

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Abstract

Occurrence of static divergence will result in a catastrophic failure of wind tunnel models supported13; on sting or other types of support . The report presents an analysis method that can be used to design and/or13; verify the design of a model-balance-sting system for preventing occurrence of static divergence of the system. Detailed explanations are given to provide a clear understanding of the static divergence phenomenon. A brief discussion indicating the conditions for which divergence can become a concern and various design factors that the designer can consider to meet the stipulated criteria, is also included . In order to ensure adequate margin of safety against divergence in pitch plane the system must13; satisfy the following criteria : i) divergence parameter D shall not exceed a value of 0 .2, and, ii) elastic13; deflection of the balance-sting combination should be limited to 3 xB0;. Excellent agreement shown between calculated and test deflection data on a typical model indicates the high accuracy of the method of obtaining model deflection and angle of attack .

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Static divergence;Wind tunnel models
Subjects: AERONAUTICS > Aerodynamics
Depositing User: Users 60 not found.
Date Deposited: 16 Jan 2009
Last Modified: 04 Oct 2013 08:54
URI: http://nal-ir.nal.res.in/id/eprint/2019

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