AR-2 main

Description. Aerodynamic unit AR-2 is used for experimental research of heat and mass exchange processes in a model boundary layer, flown over by supersonic air stream.
The main part of the unit is supersonic aerodynamic tube of continuous action with regulated plate nozzle, rectangular cross-section of the working part 100x70 and with regulated exit cone. Length - 7,5 m, width - 1 m, height - 2 m.

Unit Characteristics. Unit AR-2 is a supersonic aerodynamic tube with a regulated supersonic nozzle and an exit cone. Air supply by maximum pressure 0,8 MPa (8 atm) in the unit is provided by gasholder battery and by compressor station of Institute of Mechanics. Maximum flow rate through the unit (about 10 kg/s) does not exceed nominal compressor station capacity, providing unlimited working unit time and record all parameters at stationary heat operations, that is especially important for quantitative researches of heat exchange in supersonic flow.
Unit AR-2 is equipped with supersonic plate plane regulate nozzle. By means of this nozzle one can change the flow velocity directly during the experiment in the working part, corresponding Much number from 1,7 to 3,5. Reynolds numbers, calculated for l=100 mm, correspond with range 100000-1000000. The boundary layer thinness on the nozzle exit is about 6 mm.

Equipment. The unit AR-2 is equipped with air injection system in model boundary layer. Air is supplied into it from high-pressure main (15 MPa) through distributive collector, reducers and flow rate measuring devices. Injection system makes it possible to inject air or other gas into separated model parts, with flow rate and gas temperature being regulated separately in each of them.
The unit AR-2 is equipped with a IAB-451, a high-speed video camera, an infrared window ZnSe, a thermal image camera, an ADC National Instruments, pressure sensors IKD, software was designed in the application package Labview 7.0, Intel Pentium IV computer.

Supersonic aerodynamic unit AR-2
Characteristics Working channel dimensions: length - 450mm, width - 70mm, height - 100 mm. Range of velocities (Mach number): 1,7-3,5; Reynolds Number on the line l=100mm: 1,0100000 to 1,01000000 Air temperature in the forechamber: 285-295K Duration, min: continuous
Description. Aerodynamic unit AR-2 is used for experimental research of heat and mass exchange processes in a model boundary layer, flown over by supersonic air stream. The main part of the unit is supersonic aerodynamic tube of continuous action with regulated plate nozzle, rectangular cross-section of the working part 100x70 and with regulated exit cone. Length - 7,5 m, width - 1 m, height - 2 m. Unit Characteristics. Unit AR-2 is a supersonic aerodynamic tube with a regulated supersonic nozzle and an exit cone. Air supply by maximum pressure 0,8 MPa (8 atm) in the unit is provided by gasholder battery and by compressor station of Institute of Mechanics. Maximum flow rate through the unit (about 10 kg/s) does not exceed nominal compressor station capacity, providing unlimited working unit time and record all parameters at stationary heat operations, that is especially important for quantitative researches of heat exchange in supersonic flow. Unit AR-2 is equipped with supersonic plate plane regulate nozzle. By means of this nozzle one can change the flow velocity directly during the experiment in the working part, corresponding Much number from 1,7 to 3,5. Reynolds numbers, calculated for l=100 mm, correspond with range 100000-1000000. The boundary layer thinness on the nozzle exit is about 6 mm. Equipment. The unit AR-2 is equipped with air injection system in model boundary layer. Air is supplied into it from high-pressure main (15 MPa) through distributive collector, reducers and flow rate measuring devices. Injection system makes it possible to inject air or other gas into separated model parts, with flow rate and gas temperature being regulated separately in each of them. The unit AR-2 is equipped with a IAB-451, a high-speed video camera, an infrared window ZnSe, a thermal image camera, an ADC National Instruments, pressure sensors IKD, software was designed in the application package Labview 7.0, Intel Pentium IV computer.
Experimental research carried out on the supersonic aerodynamic unit AR-2 1. 'Porous' cooling efficiency of surfaces flown by supersonic airflow 2. 'Gas curtain' efficiency 3. Effect of 'vortex-forming' relief flown over by supersonic airflow on the equilibrium wall temperature and on the heat transfer coefficient.

General (side) view of the working part with Tepler device and a thermal image camera.	Regulate supersonic plate nozzle allowing to change flow velocity continuously in working part according to Much number 1,7-3,5

Supersonic aerodynamic unit AR-2