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Journal of Applied Fluid Mechanics، جلد ۱۸، شماره ۶، صفحات ۱۴۴۶-۱۴۵۸
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عنوان انگلیسی A Study on a Semi-empirical Model for the Local Loss Coefficient of Small Angle Contraction Pipes
چکیده انگلیسی مقاله The design of contraction pipes for efficient fluid transport and spraying applications requires a deep understanding of fluid dynamics and resistance characteristics. This study utilizes the infinitesimal element method to analyze the fluid motion within the cross-section of a circular contraction pipe and confirms that the wall shear stress is a function of the total pressure gradient and pipe diameter, in accordance with Stokes’ formula. Numerical simulations are employed to investigate the velocity distribution and transverse pressure loss pattern across the cross-section of the pipe. By making reasonable assumptions and conducting data fitting, we present a semi-empirical model that predicts pressure loss and local loss coefficients in small contraction pipes. This model is shown to be simpler, more accurate, and broadly applicable, compared with existing models. This study provides practical guidance for the design of contraction pipes and enhancement of the accuracy of pressure loss calculations, which are crucial for optimizing fluid transport systems.
کلیدواژه‌های انگلیسی مقاله Contraction pipe,Stokes&apos, formula,Numerical simulation,Pressure loss,Local loss coefficient
نویسندگان مقاله H. Sun |
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China

X. Zhu |
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China

X. Wang |
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China

J. Zhao |
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China

I. Catrawedarma |
Department of Mechanical Engineering, Politeknik Negeri Banyuwangi, Jalan Raya Jember Km. 13, Kabat, Banyuwangi 68461, Indonesia

I. Catrawedarma |
Department of Mechanical Engineering, Politeknik Negeri Banyuwangi, Jalan Raya Jember Km. 13, Kabat, Banyuwangi 68461, Indonesia

نشانی اینترنتی https://www.jafmonline.net/article_2643_01bc557db91fdd52be038737af34b3f5.pdf
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