Fluid-solid heat exchange in porous media for transpiration cooling systems
This paper presents a semi-analytical solution of the coupled differential equations for fluid and solid phase in a one-dimensional porous medium in thermal non-equilibrium. The thermal impulse response of the fluid and solid phases is used to determine the pressure loss over the thickness of the ma...
| Những tác giả chính: | , , , , |
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| Định dạng: | Conference item |
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American Institute of Aeronautics and Astronautics
2019
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| _version_ | 1826257723222654976 |
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| author | Hermann, T McGilvray, M Ifti, H Hufgard, F Loehle, T |
| author_facet | Hermann, T McGilvray, M Ifti, H Hufgard, F Loehle, T |
| author_sort | Hermann, T |
| collection | OXFORD |
| description | This paper presents a semi-analytical solution of the coupled differential equations for fluid and solid phase in a one-dimensional porous medium in thermal non-equilibrium. The thermal impulse response of the fluid and solid phases is used to determine the pressure loss over the thickness of the material. Experimental data obtained from surface heating of porous ZrB2 samples is compared to the theoretical model. The plenum pressure, surface temperature and backside temperature are measured using pressure sensors, thermographic imaging and thermocouple instrumentation The non-integer system identification (NISI) approach is used to obtain the thermal impulse response which is then compared with the model prediction. Plenum pressure rise and thermal impulse response of the heating experiments are used to assess the volumetric heat transfer coefficient of the sample. Good agreement is found between the simulated and experimental data for the temperature and pressure measurements. The obtained heat transfer coefficients are between 2.1 · 104 and 6.8 · 104 W m−3 K−1 for mass fluxes of 10 to 244 g m−2 s −1 . |
| first_indexed | 2024-03-06T18:22:41Z |
| format | Conference item |
| id | oxford-uuid:06da27b5-e5df-4983-96d1-b94400e2bc4e |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:22:41Z |
| publishDate | 2019 |
| publisher | American Institute of Aeronautics and Astronautics |
| record_format | dspace |
| spelling | oxford-uuid:06da27b5-e5df-4983-96d1-b94400e2bc4e2022-03-26T09:04:30ZFluid-solid heat exchange in porous media for transpiration cooling systemsConference itemhttp://purl.org/coar/resource_type/c_5794uuid:06da27b5-e5df-4983-96d1-b94400e2bc4eSymplectic Elements at OxfordAmerican Institute of Aeronautics and Astronautics2019Hermann, TMcGilvray, MIfti, HHufgard, FLoehle, TThis paper presents a semi-analytical solution of the coupled differential equations for fluid and solid phase in a one-dimensional porous medium in thermal non-equilibrium. The thermal impulse response of the fluid and solid phases is used to determine the pressure loss over the thickness of the material. Experimental data obtained from surface heating of porous ZrB2 samples is compared to the theoretical model. The plenum pressure, surface temperature and backside temperature are measured using pressure sensors, thermographic imaging and thermocouple instrumentation The non-integer system identification (NISI) approach is used to obtain the thermal impulse response which is then compared with the model prediction. Plenum pressure rise and thermal impulse response of the heating experiments are used to assess the volumetric heat transfer coefficient of the sample. Good agreement is found between the simulated and experimental data for the temperature and pressure measurements. The obtained heat transfer coefficients are between 2.1 · 104 and 6.8 · 104 W m−3 K−1 for mass fluxes of 10 to 244 g m−2 s −1 . |
| spellingShingle | Hermann, T McGilvray, M Ifti, H Hufgard, F Loehle, T Fluid-solid heat exchange in porous media for transpiration cooling systems |
| title | Fluid-solid heat exchange in porous media for transpiration cooling systems |
| title_full | Fluid-solid heat exchange in porous media for transpiration cooling systems |
| title_fullStr | Fluid-solid heat exchange in porous media for transpiration cooling systems |
| title_full_unstemmed | Fluid-solid heat exchange in porous media for transpiration cooling systems |
| title_short | Fluid-solid heat exchange in porous media for transpiration cooling systems |
| title_sort | fluid solid heat exchange in porous media for transpiration cooling systems |
| work_keys_str_mv | AT hermannt fluidsolidheatexchangeinporousmediafortranspirationcoolingsystems AT mcgilvraym fluidsolidheatexchangeinporousmediafortranspirationcoolingsystems AT iftih fluidsolidheatexchangeinporousmediafortranspirationcoolingsystems AT hufgardf fluidsolidheatexchangeinporousmediafortranspirationcoolingsystems AT loehlet fluidsolidheatexchangeinporousmediafortranspirationcoolingsystems |