Combined convective and radiative heat transfer in an axisymmetric solar thruster is analyzed. In such a thruster, the focused solar energy is converted volumetrically into thermal energy, resulting in a significant increase in the temperature of the working fluid. In the present theoretical analysis, submicron size particles are considered for providing the mechanism of the absorption. The two-dimensional radiation problem is solved using both an exact method and the P1 - approximation. The overall energy transfer is solved iteratively by numerical means. The effects of the Boltzmann number, the optical dimensions, and peripheral wall emissivity on the numerical results using both the exact and the approximate solution techniques to the radiation problem are discussed.
|Original language||English (US)|
|Number of pages||8|
|Journal||American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD|
|State||Published - 1990|
All Science Journal Classification (ASJC) codes
- Fluid Flow and Transfer Processes
- Mechanical Engineering