Multi-Channel Pressure Fields Measuring Systems
Multi-channel pressure modules are the main mean of investigating the pressure distribution on the model surface which use the strain gage principle of converting pressure into electric signal.
A number of multi-point pressure modules is developed in TsAGI according to the number of channels (MMD-24; MMD-32; MMD-48; MMD-64; MMD-128) and a new generation measuring system with multi-point pressure modules is created.
Comparative Performances of Multi-Channel Pressure Modules
|Measurement range, kPa||100||100||100||100|
|Measuring error, %||0.15…0.2||≤0.15||0.15||0.15|
|Volume per channel (without fittings), sm3/ch||2.2||0.18||2.3||0.56|
|Outer dimensions (without fittings), mm||70×32×30||59×12×9||102×75×20||42×27×22|
|Output signal||analog||analog||digital RS485||analog|
|Number of channels:|
|MMD-32 (16 modules)||512|
|MDK-64 (8 modules)||512|
|EMMD-48 (10 modules)||480|
|Rated pressure, kPa||10; 40; 100|
|Data acquisition rate, channel/s||5000|
|Baseline reduced error of pressure measuring, %||±0.15|
- Pressure distribution research in wind tunnels of TsAGI and other organizations of the branch.
- Testing the An-78 aircraft model (USC "Antonov") in T-106 WT (TsAGI).