Nuclear rockets with specific impulse have obvious advantages by greatly reducing the mass of the propellant and potentially decreasing the cost of launching material from the earth’s surface. Nuclear thermal rockets use hydrogen propellant with coolant exit temperature of near 3000 K, which is very high, so the cooling of airframe surfaces in the vicinity of the exhaust is needed, of which film cooling is an effective method. Most of previous studies mainly focus on the film cooling effectiveness using two dimensional backward-facing step model, however, the nuclear rocket exhaust using the converging-diverging Laval nozzle, so the film cooling would be different. The present study numerically investigated the influence of coolant Mach number, coolant inlet height on supersonic film cooling in the diverging section of Laval nozzle, while keeping the coolant mass flow rate constant, with the results showing that: increasing the coolant inlet Mach number and the coolant inlet height can increase the film cooling effectiveness; for the same coolant mass flow rate, reducing the coolant inlet height and increasing the inlet Mach number improves film cooling effectiveness.
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2018 26th International Conference on Nuclear Engineering
July 22–26, 2018
London, England
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5149-4
PROCEEDINGS PAPER
Numerical Study of Supersonic Film Cooling in Diverging Section of Nuclear Rocket Laval Nozzle Available to Purchase
Xiaokai Sun,
Xiaokai Sun
Tsinghua University, Beijing, China
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Peixue Jiang,
Peixue Jiang
Tsinghua University, Beijing, China
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Jie Wang
Jie Wang
Tsinghua University, Beijing, China
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Xiaokai Sun
Tsinghua University, Beijing, China
Ping Ye
Tsinghua University, Beijing, China
Peixue Jiang
Tsinghua University, Beijing, China
Wei Peng
Tsinghua University, Beijing, China
Jie Wang
Tsinghua University, Beijing, China
Paper No:
ICONE26-81806, V06BT08A004; 5 pages
Published Online:
October 24, 2018
Citation
Sun, X, Ye, P, Jiang, P, Peng, W, & Wang, J. "Numerical Study of Supersonic Film Cooling in Diverging Section of Nuclear Rocket Laval Nozzle." Proceedings of the 2018 26th International Conference on Nuclear Engineering. Volume 6B: Thermal-Hydraulics and Safety Analyses. London, England. July 22–26, 2018. V06BT08A004. ASME. https://doi.org/10.1115/ICONE26-81806
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