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1. chinaXiv:201711.00047 [pdf]

Investigation on Inlet Recirculation Characteristics of Double Suction Centrifugal Compressor with Unsymmetrical Inlet

Yang, C., ; Wang, Y. J.,; Lao, D. Z., ; Tong, D., ; Wei, L. Y. ; Liu, Y. X.
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

This paper focuses on the flow characteristic and local resistance of non-Newtonian power law fluid in a curved 90 bend pipe with circular cross-sections, which are widely used in industrial applications. By employing numerical simulation and theoretical analysis the properties of the flow and local resistance of power law fluid under different working conditions are obtained. To explore the change rule the experiment is carried out by changing the Reynolds number, the wall roughness and different diameter ratio of elbow pipe. The variation of the local resistance coefficient with the Reynolds number, the diameter ratio and the wall roughness is presented comprehensively in the paper. The results show that the local resistance force coefficient hardly changes with Reynolds number of the power law fluid; the wall roughness has a significant impact on the local resistance coefficient. As the pipe wall roughness increasing, the coefficient of local resistance force will increase. The main reason of the influence of the roughness on the local resistance coefficient is the increase of the eddy current region in the power law fluid flow, which increases the kinetic energy dissipation of the main flow. This paper provides theoretical and numerical methods to understand the local resistance property of non-Newtonian power law fluid in elbow pipes.

submitted time 2017-11-02 From cooperative journals:《热科学学报》 Hits1080Downloads550 Comment 0

2. chinaXiv:201612.00373 [pdf]

Prospect of a very long baseline neutrino oscillation experiment: HIPA to Beijing

H2B-1,VSG; Chen,H; Ding,L; He,J; Kuang,H; Lu,Y; Ma,Y; Shan,L; Shen,C; Wang,Y; Yang,C; Zhang,X; Zhu,Q; Qing,C; Xiong,Z; Yang,JM; Zhang,Z; Chen,J; Ye,Y; Lee,S
Subjects:

We discuss the prospects of a very long baseline neutrino oscillation experiment from HIPA to Beijing. The current understanding of neutrino oscillations, both theoretically and experimentally, are summarized. The figure of merits for interested physics m

submitted time 2016-12-28 Hits2072Downloads1119 Comment 0

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