Calibration of the 5 in. x 5 in. induction tunnel with 2 in. x 10 in. test section having normal hole perforated walls and without plenum auxiliary suction

Arora, NL (1964) Calibration of the 5 in. x 5 in. induction tunnel with 2 in. x 10 in. test section having normal hole perforated walls and without plenum auxiliary suction. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

The NAL 5 in. x 5 in. induction type transonic tunnel with a two-dimensional test section of 2 in. x 10 in. has been calibrated with top and bottom nozzle plates having normal perforated holes. The results are presented in the form of the basic tunnel calibration, the Mach number distribution along the perforated wall, the energy ratio and the characteristics of the flow across the test section. During13; the tests, the blowing pressure was varied from 30 to 60 p.s.i.g., while the injector nozzles were completely open and the divergence angle of the test section top and bottom plates was kept fixed at 2xB0;.13; 13; The results show that the Mach number distribution is uniform between the stations (6) and (12) and hence this region can be considered the useful working region where the test model can be located. It is also found that 40% width of the test section on either side of the centre line is not affected by the sidewall boundary layer.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Induction tunnel;Mach number;Perforated wall;Injector nozzle; 13; Plenum auxiliary suction
Subjects: AERONAUTICS > Aerodynamics
Depositing User: Mr. Ravikumar R
Date Deposited: 18 Jan 2007
Last Modified: 24 May 2010 04:24
URI: http://nal-ir.nal.res.in/id/eprint/3917

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