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�������պ����ѧѧ�� 2011, Vol. 37 Issue (8) :943-947    DOI:
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Effects of driving load and pipe diameter on flow characteristic of two-phase boiling water
Ma Qicheng, Song Baoyin, Shan Shaorong*
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016,China

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Abstract�� The centrifugal force resulted from a rotational platform was used to simulate the flying load and the experiment of two-phase boiling water flowing in different diameter pipes under driving load was conducted. By changing the parameters, such as driving load, pipe diameter, flow rate, and so on, some flow characteristics of the boiling water were obtained. The image of flow patterns under dynamic load was obtained with a video camera. The results reveal that the dynamic load whose direction is the same as the flow direction and pipe diameter dramatically influence the flow characteristic of the boiling water. Some new flow patterns were observed under dynamic load. In addition, the dynamic load weakens the flow stability of the boiling water. The greater the dynamic load, the lower the pressure drop. And for a bigger diameter pipe, the pressure drop will decrease more obviously. The experimental data can be added to the database in the flow characteristic of gas-liquid two-phase pipe flow under dynamic load, and can be a reference in developing the vapor-cycle cooling system for flying vehicles.
Keywords�� driving load   pipe inner diameter   boiling water   experimental research     
Received 2010-04-13;
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������Ȼ��ѧ����������Ŀ(50576035); �ߵ�ѧУ��ʿѧ�Ƶ�ר����л�����Ŀ(20040287017)

About author: ������(1985-),��,ɽ��������,˶ʿ��,sdmaqicheng@163.com.
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������, �α���, ������.˳�غ͹ܾ��Թ���ˮ���������������Ե�Ӱ��[J]  �������պ����ѧѧ��, 2011,V37(8): 943-947
Ma Qicheng, Song Baoyin, Shan Shaorong.Effects of driving load and pipe diameter on flow characteristic of two-phase boiling water[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(8): 943-947
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