1. Multi hole Pressure Probe calibration facilities:
A. Low speed calibration facility:
Multihole pressure probes have wide range of applications in terms of measurements in special applications like turbomachines flow field, wind tunnel experimentation applications etc. The primary measurement variables of interest are static pressure, dynamic pressure, three velocity components, flow direction etc., which can be measured using a multihole pressure probes with higher accuracy. The applications of such probes in measurement fields demands for higher accuracy of calibration, especially in terms of flow angularity and precision.The manual calibration of multi hole probe is difficult and time consuming task in an acceptable range of pitch and yaw angles. The present paper discusses the low speed multihole pressure probe calibration facility developed at IIT Kharagpur using a two-axis angular traverse mechanism.Special algorithms using LABVIEW were developed for automatic traverse both for yaw and pitch direction and also for pressure data acquisition using pressure scanner, to achieve precious measurement with short time spend with angular precision in terms of 0.5 deg. This facility is capable of calibrating multi hole pressure probes for different Reynolds numbers and angular range.
Specifications:
Test section 200*200*500 mm rectangular section
Speed : upto 50 m/s
Turbulence Intensity : 0.5
B. High speed calibration wind tunnel.
Multihole pressure probes have wide range of applications in terms of measurements in special applications like turbomachines flow field, wind tunnel experimentation applications etc. The primary measurement variables of interest are static pressure, dynamic pressure, three velocity components, flow direction etc., which can be measured using a multihole pressure probes with higher accuracy. The applications of such probes in measurement fields demands for higher accuracy of calibration, especially in terms of flow angularity and precision.The manual calibration of multi hole probe is difficult and time consuming task in an acceptable range of pitch and yaw angles. The present paper discusses the low speed multihole pressure probe calibration facility developed at IIT Kharagpur using a two-axis angular traverse mechanism. Special algorithms using LABVIEW were developed for automatic traverse both for yaw and pitch direction and also for pressure data acquisition using pressure scanner, to achieve precious measurement with short time spend with angular precision in terms of 0.5 deg. This facility is capable of calibrating multi hole pressure probes for different Reynolds numbers and angular range.
Specifications:
Test section : Free Jet
Speed : upto 200 m/s
2. Low speed Linear Compressor/Turbine cascade facility:
3. Sector annular Compressor/Turbine cascade tunnel.
4. Low speed axial flow compressor stage test facility.
a. Tandem bladed axial flow rotor testing
5. Low speed, Low turbulence adverse/ favorable pressure gradient study tunnel.
6. Low speed CRAC compressor test facility.
7. Turbine blade cooling testing facility. (Under developement)