دراسة تأثير الفيض الحراري في الاهتزاز الناتج عن جريان مائع خلال أنبوب يحتوي على حاجز في منتصفه

كاظم, زينه خليه; علوان, عمر هاشم

doi:10.30684/etj.26.10.15

	دراسة تأثير الفيض الحراري في الاهتزاز الناتج عن جريان مائع خلال أنبوب يحتوي على حاجز في منتصفه
Engineering and Technology Journal
Article 1, Volume 26, Issue 10, 2008, Pages 401-416 PDF (277.75 K)
DOI: 10.30684/etj.26.10.15
Authors
زينه خليه كاظم; عمر هاشم علوان
Abstract
In this work theoretical study is carried out to the effect of heat flux on induced vibrations from a fluid flow in a simply and flexible supported pipe with a restriction.The water flow in the pipe is assumed to be fully developed region . The dynamics of a pipe conveying fluid is described by the transfer matrix approach. It provides a numerical technique for solving the equations of motion of forced and free vibrations for simply and flexible support .The pipe is divided into (21) nodes and (20) element along its length.Then, from the pipe analysis equation, a fortran Language computer program has been built to embrace the theoretical and analytical work. And then to ensure that the program developing is suitable, it has been compared with another program called (ANSYS Ver.9) which it use FEM.The Obtained results show that the transfer matrix method is a suitable technique to compute the eigen modes in addition to the natural frequency of vibration systems.From this research it has been found that the heat flux affects the natural frequencies and the amplitude of vibration . So the increasing the thermal force results in the decreasing of the magnitude of the natural frequencies. The amplitudes of vibration along the pipe increase as the excitation frequency is so close to the natural frequencies of the system, and this effect is predominate than the effect of the heat flux .
Keywords
Effect of Heat Flux On Induced Vibrations; Fluid Flow In A pipe With A Restriction At Mid The Pipe

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