Heat flux measurement using swept null point calorimetry

Comparison of Heat Flux Gages for High Enthalpy Flows - NASA Ames and IRS

“…The sensors were originally developed for extreme heat flux measurements in the AEDC arc-jet facilities. 23 This sensor type is also applied in the plasma wind tunnels at Airbus in Bordeaux, France and was improved by using the NISI calibration method. 2 With this calibration approach, miniaturized sensors were developed which thus achieve better geometrical resolution.…”

Heat flux measurement in a high enthalpy plasma flow

“…As mentioned in the previous section, the sequence and the length of laser pulses have been generated randomly. The maximum heat flux density measured for this experience is 4x10 6 Wm -2 . When the theoretical approach as described in section 2 is applied, the system can be identified from these calibration measurements.…”

“…Furthermore, an additional air gap shall strengthen the assumption of one-dimensional heat transfer. This sort of sensor has been developed in the beginning of the 1970s and further extensive studies were performed in the 1990s [6], [7]. Heat transfer in the sensor is classically treated as a one dimensional heat transfer in a semi infinite homogeneous medium.…”

Review of Heat Flux Measurements for High Enthalpy Flows

“…The classical null-point calorimeter was developed in the 1970s at AEDC. 40 This design basically did not change until now, when new data analysis methods became available. 41 Figure 4 shows the classical null-point (left) and the improved and miniaturized version (right).…”