Overview of NTAF activities and perspective for future

Suryanarayana, GK (2009) Overview of NTAF activities and perspective for future. In: National Conference on Wind Tunnel Testing (2009-IT8), 12-14 Mar 2009, IISc., Bangalore.

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Abstract

The overall activities of NTAF are presented, with focus on the capabilities of NTAF in design of models and support systems, development of special test facilities, test techniques and analysis of results. Various types of models and support systems are presented, highlighting the role of design of models and support systems. The new test facilities developed under NTAF augmentation programmes will be briefly described. The concept of a variable mach number flexible nozzle for the existing 0.6m transonic wind tunnel to enhance the testing capability from transonic to supersonic mach numbers (1.0 to 4.0) is presented. This involves continuous and on-line change of nozzle contour using a single hydraulic jack for fast response. Animations and videos of operation of the hardware developed for the 0.6m wind tunnel are shown, demonstrating continuous change to nozzle contour using a single servo-controlled hydraulic jack. Some results of hardware-in-loop simulations showing the command and feedback outputs for mach number change in present mode, step mode and continuous mode are presented. The problem associated with matching of two independent time-dependant systems is introduced, along with some strategies for proper understanding of the dynamics, which is absolutely essential for development of automatic control systems to operate the wind tunnel in the most efficient manner. Some ideas on further augmentation of the 1.2m wind tunnel, considering the future aerospace programmes of the country are presented.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Wind tunnel
Subjects: AERONAUTICS > Aeronautics (General)
Division/Department: National Trisonic Aerodynamic Facility
Depositing User: Ms. Alphones Mary
Date Deposited: 24 Aug 2009
Last Modified: 24 May 2010 09:56
URI: http://nal-ir.nal.res.in/id/eprint/5168

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