Fabian Hufgard, Stefan Loehle, Hannah Boehrk, Matthew McGilvray, Johan Steelant, Stefanos Fasoulas

DOI Number XXX-YYY-ZZZ

Conference Number HiSST-2022-109

In this paper the design of a novel heat flux sensor is presented. The sensor is based on the PressureBased Non-Integer System Identification (NISIp) method for a transpiration cooled material. Here,
the pressure reading at the upstream side of the porous wall, the plenum, is used for the inverse
determination of surface heat flux. For this, the pressure impulse response and measurement accuracy
is found by laser calibration. Three sensors with equal design and geometry, but featuring different
porous materials, zirconium diboride, carbon/carbon and copper, were investigated. The response time
of a carbon/carbon sensor is significantly shorter than for the other materials. A maximum deviation
of 8% to 13% was found for the presented NISIp sensors. The experimental investigation of different
plenum volumes yields that the plenum volume has a damping effect on the temporal behaviour of the
plenum pressure

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In Categories: 1.Events, HiSST 2022, Testing and Evaluation
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