CLC number:
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2023-04-25
Cited: 0
Clicked: 1281
Citations: Bibtex RefMan EndNote GB/T7714
Jingfeng LI, Kai WANG, Chenjie GU, Limin QIU. Exhaust process of cryogenic nitrogen gas from a cryogenic wind tunnel with an inclined exit[J]. Journal of Zhejiang University Science A, 2023, 24(5): 419-431.
@article{title="Exhaust process of cryogenic nitrogen gas from a cryogenic wind tunnel with an inclined exit",
author="Jingfeng LI, Kai WANG, Chenjie GU, Limin QIU",
journal="Journal of Zhejiang University Science A",
volume="24",
number="5",
pages="419-431",
year="2023",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2200289"
}
%0 Journal Article
%T Exhaust process of cryogenic nitrogen gas from a cryogenic wind tunnel with an inclined exit
%A Jingfeng LI
%A Kai WANG
%A Chenjie GU
%A Limin QIU
%J Journal of Zhejiang University SCIENCE A
%V 24
%N 5
%P 419-431
%@ 1673-565X
%D 2023
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2200289
TY - JOUR
T1 - Exhaust process of cryogenic nitrogen gas from a cryogenic wind tunnel with an inclined exit
A1 - Jingfeng LI
A1 - Kai WANG
A1 - Chenjie GU
A1 - Limin QIU
J0 - Journal of Zhejiang University Science A
VL - 24
IS - 5
SP - 419
EP - 431
%@ 1673-565X
Y1 - 2023
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2200289
Abstract: A new structural design for the vent stack with an inclined exit was proposed to reduce the settlement hazard of the cryogenic plume from a cryogenic wind tunnel; it extends the plume trajectory to increase the effective contact space and time for mixing between the plume gas and atmospheric air before the plume settles to the ground, contributing to more efficient energy consumption for heating. Reduced-scale experiments and numerical simulations of plume dispersion based on vertical and 30°- and 45°-inclined exits were conducted to study harm reduction and energy-saving potential. Analyses of the minimum temperature and minimum oxygen concentration of the plume near the ground indicate that the new exhaust design with an inclined exit clearly reduces the settlement hazard. Under windless conditions and without using a fan-ejector system, up to 15.9% of the heating energy used by the burner can be saved by adopting the new design.
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