scholarly journals Total Temperature Measurements in Icing Cloud Flows Using a Rearward Facing Probe

2019 ◽  
Author(s):  
Juan H. Agui ◽  
Peter Struk ◽  
Tadas Bartkus
Keyword(s):  
Temperature Measurements ◽  
Total Temperature

Unsteady Total Temperature Measurements Downstream of a High-Pressure Turbine

1998 ◽  
Vol 120 (4) ◽  
pp. 760-767 ◽  
Author(s):  
D. R. Buttsworth ◽  
T. V. Jones ◽  
K. S. Chana
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Wind Tunnel ◽  
Convective Heat Transfer Coefficient ◽  
Fast Response ◽  
Temperature Measurements ◽  
High Pressure Turbine ◽  
Response Device ◽  
Temperature Probe ◽  
Total Temperature

An experimental technique for the measurement of flow total temperature in a turbine facility is demonstrated. Two thin film heat transfer gases located at the stagnation point of fused quartz substrates are operated at different temperatures in order to determine the flow total temperature. With this technique, no assumptions regarding the magnitude of the convective heat transfer coefficient are made. Thus, the probe can operate successfully in unsteady compressible flows of arbitrary composition and high free-stream turbulence levels without a heat transfer law calibration. The operation of the total temperature probe is first demonstrated using a small wind tunnel facility. Based on results from the small wind tunnel tests, it appears that the probe total temperature measurements are accurate to within ±1 K. Experiments using the probe downstream of a high-pressure turbine stage are than described. Both high and low-frequency components of the flow total temperature can be accurately resolved with the present technique. The probe measures a time-averaged flow total temperature that is in good agreement with thermocouple measurements made downstream of the rotor. Frequencies as high as 182 kHz have been detected in the spectral analysis of the heat flux signals from the total probe. Through comparison with fast-response aerodynamic probe measurements, it is demonstrated that the current measurement location, the total temperature fluctuations arise mainly due to the isentropic extraction of work by the turbine. The present total temperature probe is demonstrated to be an accurate, robust, fast-response device that is suitable for operation in a turbomachinery environment.

scholarly journals Unsteady Total Temperature Measurements Downstream of a High Pressure Turbine

1997 ◽  
Author(s):  
D. R. Buttsworth ◽  
T. V. Jones ◽  
K. S. Chana
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Wind Tunnel ◽  
Convective Heat Transfer Coefficient ◽  
Fast Response ◽  
Temperature Measurements ◽  
High Pressure Turbine ◽  
Response Device ◽  
Temperature Probe ◽  
Total Temperature

An experimental technique for the measurement of flow total temperature in a turbine facility is demonstrated. Two thin film heat transfer gauges located at the stagnation point of fused quartz substrates are operated at different temperatures in order to determine the flow total temperature. With this technique, no assumptions regarding the magnitude of the convective heat transfer coefficient are made. Thus, the probe can operate successfully in unsteady compressible flows of arbitrary composition and high free-stream turbulence levels without a heat transfer law calibration. The operation of the total temperature probe is first demonstrated using a small wind tunnel facility. Based on results from the small wind tunnel tests, it appears that the probe total temperature measurements are accurate to within ± 1K. Experiments using the probe downstream of a high pressure turbine stage are then described. Both high and low frequency components of the flow total temperature can be accurately resolved with the present technique. The probe measures a time-averaged flow total temperature that is in good agreement with thermocouple measurements made downstream of the rotor. Frequencies as high as 182 kHz have been detected in the spectral analysis of the heat flux signals from the total temperature probe. Through comparison with fast-response aerodynamic probe measurements, it is demonstrated that at the current measurement location, the total temperature fluctuations arise mainly due to the isentropic extraction of work by the turbine. The present total temperature probe is demonstrated to be an accurate, robust, fast-response device that is suitable for operation in a turbomachinery environment.

High speed rotor wake total temperature measurements using a hot-film anemometer

1997 ◽  
Author(s):  
Robert Johnston ◽  
Sanford Fleeter ◽  
Robert Johnston ◽  
Sanford Fleeter
Keyword(s):  
High Speed ◽  
Temperature Measurements ◽  
Rotor Wake ◽  
Total Temperature ◽  
Hot Film

Using Infrared Sensor for Large Area Canopy Total Temperature Measurements of Rice Plants

2013 ◽  
Vol 29 (1) ◽  
pp. 115-122 ◽  
Author(s):  
M. Wang ◽  
D. Dong ◽  
W. Zheng ◽  
L. Jiao ◽  
X. Zhao ◽  
...  
Keyword(s):  
Temperature Measurements ◽  
Infrared Sensor ◽  
Large Area ◽  
Rice Plants ◽  
Total Temperature

CARS TEMPERATURE MEASUREMENTS IN A PLASMA HEATED COAL COMBUSTOR

1987 ◽  
Vol 48 (C7) ◽  
pp. C7-757-C7-760
Author(s):  
P. SPIBERG ◽  
C. CAHEN ◽  
P. DESCHAMPS
Keyword(s):  
Temperature Measurements
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