MAU_main

Description and equipment. Aerodynamic unit “SAU-Siemens” was created to investigate heat exchange intensification on the surfaces with complex relief (dimples, grooves, etc) in flat channels at subsonic flow of working medium (air). Air is supplied to the unit by means of a high-pressure fan “MOVEN” connected through the frequency modulator DELTA VFD-F. So it is possible to change flow velocity in the working part in the range of 5-120 m/s with a step 0,1 m/s. Oil thermostat regulates heating of the model under investigation and develops the difference between air flow temperature and model surface up to 120 C. The unit is provided with infra-red window made of ZnSe (310x180x10), a thermal image camera ThermaCAM SC3000 which makes it possible to record heat characteristics of the model contactlessly with high space resolution without destroying the integrity of the model and disturbing the flow. Pressure fields in the working part are measured by differential pressure sensors Honeywell. The installed stepper motors equipped with pressure and temperature probe make it possible to measure pressure and temperature profiles across the whole channel in different locations of the working part. Data obtaining, processing and storage system includes an analog-digital-converter National instruments NI6471 (64 channels, 1,25MH, 16 bit), codes designed with in the application package Labiew 7.0, Intel Pentium IV computer.

Small subsonic aerodynamic unit “MAU-Siemens”
Characteristics Working channel dimensions: length – 1200 mm, width – 300 mm, height – 30 mm; 50mm. Air velocity range in a working channel: 5-120 m/s with a step 0,1 m/s. Mass air rate: 0,2-1,3 kg/s Fan capacity: 45 kW. Frequency modulator: DELTA VFD-F Oil thermostat capacity: 2 kW. Model/flow temperature difference: up to 120C
Description and equipment. Aerodynamic unit “SAU-Siemens” was created to investigate heat exchange intensification on the surfaces with complex relief (dimples, grooves, etc) in flat channels at subsonic flow of working medium (air). Air is supplied to the unit by means of a high-pressure fan “MOVEN” connected through the frequency modulator DELTA VFD-F. So it is possible to change flow velocity in the working part in the range of 5-120 m/s with a step 0,1 m/s. Oil thermostat regulates heating of the model under investigation and develops the difference between air flow temperature and model surface up to 120 C. The unit is provided with infra-red window made of ZnSe (310x180x10), a thermal image camera ThermaCAM SC3000 which makes it possible to record heat characteristics of the model contactlessly with high space resolution without destroying the integrity of the model and disturbing the flow. Pressure fields in the working part are measured by differential pressure sensors Honeywell. The installed stepper motors equipped with pressure and temperature probe make it possible to measure pressure and temperature profiles across the whole channel in different locations of the working part. Data obtaining, processing and storage system includes an analog-digital-converter National instruments NI6471 (64 channels, 1,25MH, 16 bit), codes designed with in the application package Labiew 7.0, Intel Pentium IV computer.
Experimental research carried out on the supersonic aerodynamic unit “SAU-Siemens”. 1. Hydraulic drag and heat exchange ratio on the surfaces with complex “vortex-forming” relief in flat channels at subsonic flow velocities. 2. Simultaneous measurement of drag and heat-transfer coefficients on smooth and “vortex-forming” surfaces, flown over by subsonic air flows.

General view of “SAU-Siemens”	Top view of the working channel with an infra-red window

Small subsonic aerodynamic unit “MAU-Siemens”