Data Acquisition and Processing for Measurements of Start/Stop Loads from the NAL-0.6m Blowdown Wind Tunnel

Sridhar, PS and Manimekalai, B and Sundaramurthy, H (1999) Data Acquisition and Processing for Measurements of Start/Stop Loads from the NAL-0.6m Blowdown Wind Tunnel. In: 118th Supersonic Tunnel Association International (STAI), 11Oct 2012, BRUSSELS, BELGIUM.

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    Abstract

    Occurrence of very high starting and stopping transient loads in intermittent blowdown wind tunnels operating at a high supersonic Mach numbers is a well known phenomenon. To avoid such loads in NAL 0.6m wind tunnel, a continuously Variable Mach number Flexible nozzle (VMFN) was conceived. The VMFN is designed to start the wind tunnel at a low Mach number and low stagnation pressure (P0) and rapidly change the nozzle counter to reach the desired Mach number (upto 4.0) along with the synchronous increase in P0. The reverse procedure can be adopted while stopping the tunnel. The objective of the present work is to develop Software to acquire and process the transient loads that arise during the transition from low to high Mach numbers to high Mach number and vice-versa, as well as to acquire steady loads during the test Mach number in the NAL 0.6m blowdown wind tunnel.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: rheology, slip casting, suspension, Si3N4, silico
    Subjects: ENGINEERING > Communications and Radar
    Division/Department: National Trisonic Aerodynamic Facilities, National Trisonic Aerodynamic Facilities, National Trisonic Aerodynamic Facilities
    Depositing User: Ms Indrani V
    Date Deposited: 15 Jan 2014 09:38
    Last Modified: 15 Jan 2014 09:38
    URI: http://nal-ir.nal.res.in/id/eprint/11883

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