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�������պ����ѧѧ�� 2008, Vol. 34 Issue (04) :365-368    DOI:
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�½���1, Ԭ�޸�1, �Ʊ���2*
1. �������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100083;
2. �й��ռ似���о�Ժ, ���� 100094
Pressurized pressure-restoring system for large scale vacuum chamber
Chen Jinming1, Yuan Xiugan1, Huang Bencheng2*
1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. China Academy of Space Technology, Beijing 100094, China

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Abstract�� Pressure-restoring process has strict requirements in some special purpose establishments such as ground simulator for astronauts- training. A pressurized pressure-restoring system was designed for large-scale vacuum chambers with a view of analyzing the pressure-restoring process with high speed requirement. Simulation models were established with special focus on heat transfer, while incorporating segmented centralized parameter models of a long gas tube. An simulation analysis was done to the models. The calculations show that the pressurized pressure-restoring rate is much greater than that of regular pressure-restoring, the rate is strained by heat transfer, and the segmented centralized parameter models of the long gas tube deliver better accuracy than the other kinds of models but with no more calculating jobs. Compared the simulation calculations of heat transfer with the actual debugging situation in the pressure-restoring test of a large 200��m3 chamber, the error is no more than 5%, which proves the reliability of the whole simulation.
Keywords�� pressurized pressure-restoring   distributed model of long tube   heat transfer   simulation     
Received 2007-03-28;
About author: �½���(1963-),��,�����ŷ���,��ʿ��,yuanxg@buaa.edu.cn.
�½���, Ԭ�޸�, �Ʊ���.�������������ѹ��ѹϵͳ[J]  �������պ����ѧѧ��, 2008,V34(04): 365-368
Chen Jinming, Yuan Xiugan, Huang Bencheng.Pressurized pressure-restoring system for large scale vacuum chamber[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(04): 365-368
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