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�������պ����ѧѧ�� 2011, Vol. 37 Issue (5) :600-604    DOI:
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��Ω�, ����, ��ï��*
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Analysis on transmitting characteristics of pressure waves in pipeline
Lin Weiqin, Huang Liang, Cai Maolin*
School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� Based on the theory of one-dimensional unsteady flow, a distributed parameter model of gas transmitting in pipeline was given. Then the model was solved with upwind difference formula, numerical simulations of the transmission of pressure waves in the pipe were also performed. Comparing the result of simulation with experiments, it was verified that this model was correct. And then the initial condition, such as the pipe diameter, air velocity, inlet pressure and the space step of simulation, was changed to simulate the different characteristics of the pipeline. Comparative analysis of the simulation results, the characteristics of the pressure waves of different waveforms under different conditions in the pipeline were obtained. The simulation shows that when using pressure wave to gas flow measure, it should use the waveform of half part of sine or square.
Keywords�� unsteady gas flow   upwind difference   pressure wave   transmit     
Received 2010-09-27;

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About author: ��Ω�(1986-),��,�㶫������,˶ʿ��,linweiqin2006@163.com.
��Ω�, ����, ��ï��.�����ܵ���ѹ�����Ĵ������Է���[J]  �������պ����ѧѧ��, 2011,V37(5): 600-604
Lin Weiqin, Huang Liang, Cai Maolin.Analysis on transmitting characteristics of pressure waves in pipeline[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(5): 600-604
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