Pressure loss at unsteady motion of incompressible fluid in the pipeline
DOI:
https://doi.org/10.15587/1729-4061.2013.18521Keywords:
unsteady, non-stationary, fluid motion, velocity distribution, flow structure, pressure loss, inertial pressureAbstract
The analysis of available literature data on unsteady motion of fluid was made. It was shown that the velocity distribution at unsteady motion does not correspond to the velocity distribution peculiar to steady motion. According to the literature data, the change of velocity distribution in pressure pipelines during unsteady motion is little studied experimentally. The irregularity of velocity distribution on the effective cross-section is not taken into account during the determination of inertial pressure in the used calculation methods. When analyzing the experimental data it was revealed that at the present level of practical hydrodynamics necessary information about the flow structure can be obtained by the flow visualization with simultaneous measurement of velocity fields and turbulence characteristics. Based on the experimental and theoretical studies an improved method was suggested for determining the pressure loss at unsteady motion of incompressible fluid in pipelines.
References
- Громека И.С. К теории движения жидкости в узких цилиндрических трубах [Текст] / И.С. Громека // Уч. зап. Казанского ун-та, 1882, соб . соч., Изд. АН СССР.- 1952.- С.149-171.
- Слезкин Н.А. Свойства потоков жидкости, пульсирующей по трубам [Текст] / Н.А. Слезкин // Хим. и нефт. машиностр.- 1969.- №9. – С. 14-17.
- Дейвис Исследование влияния зависящей от давления вязкости на характеристики течения жидкости в круглой трубе [Текст] / Дейвис, Вебер// Ракетн. техн. и космонавт.- 1973.- 11, №7. – С. 13-19.
- Панчурин Н.А. Нестационарное периодическое течение жидкости в
- круглых трубах [Текст] / Н.А. Панчурин, Д.Х. Ройзман // Труды Ленингр. ин-та
- водн. трансп.- 1975, вип. 151. – С. 8-16.
- Панчурин Н.А. Потери на трение при нестационарном ламинарном течении в трубах [Текст] / Н.А. Панчурин // Труды Ленингр. ин-та водн. трансп., 1964, вип. 77. – С. 38-43.
- Мелконян Г.И. О потерях напора на трение в нестационарном движении жидкости в трубопроводе [Текст] / Г.И. Мелконян // Труды Ленингр. ин-та водн. трансп., 1969, вип. 122. – С. 68-73.
- Попов Д.Н. Обобщенное уравнение для определения касательного напряжения на стенке трубы при неустановившемся движении вязкой жидкости [Текст] / Д.Н. Попов // Изв. высш. учебн. заведений. Машиностроение, 1967.- №5. – С. 52-57
- Попов Д.Н. О потерях в трубопроводе при неустановившемся движении жидкости [Текст] /Д.Н. Попов // Вестн. машиностр.- 1969.- №6. – С. 19-20.
- Попов Д.Н. Исследование неустановившегося движения жидкости при переходных процессах в короткой трубе [Текст] / Д.Н. Попов, В.Г. Кравченко // Вестн. машиностр.- 1974.- №6. - С. 7-10.
- Белоцерковский П.М. Ламинарное почти установившееся течение несжимаемой жидкости в длинном цилиндрическом канале [Текст] / П.М. Белоцерковский // Научн. тр. ин-та автоматики. М-во приборостр., средств атоматиз. и систем упр. СССР.- 1975.- вип. 7. – С. 69-74.
- Чугаев P.P. Гидравлика: Учебник для вузов [Текст] /Р.Р. Чугаев.- Л.: Энергоиздат. Ленингр. отделение, 1982.- 672 с.
- Гнатів Р.М. Експерименталні дослідження неусталених течій в трубах [Текст] / Р.М.Гнатів, І.П.Вітрух // Промислова гідравліка і пневматика.-2009.-№4 (26).-С.28-31.
- Гнатів Р.М. Фізичні дослідження неусталених потоків лазерних допплерівським вимірювачем швидкості [Текст] / Р.М.Гнатів, В.Ю.Петринець, В.В.Чернюк // Вісник НУВГП.-Вип.3 (47).-Част.5.-2009.-С.264-268.
- Чернюк В.В. Візуалізація структури потоків в круглих трубах [Текст] / В.В. Чернюк// Кіно-та фотореєстрація. Промислова гідравліка і пневматика. 2004.- №4(6).-С.9-12.
- Gromek, I.S. (1952). The theory of fluid motion in narrow cylindrical tubes. Uch. Rec. Kazan University, 1882, GSS. cit., Vol. Academy of Sciences of the USSR, 149-171.
- Sliozkin, N.A. (1969). Properties of fluid flow, pulsating through the pipes. Chem. and petroleum. mechanical engineering, № 9, 14-17.
- Davis, Weber (1973). Effect of pressure-dependent viscosity on the characteristics of the fluid flow in a circular pipe. Rocket. tehn. and astronaut, 11, № 7, 13-19.
- Panchurin, N.A., Roizman, D.H. (1975). Unsteady periodic fluid flow in circular pipes. Trudy Leningrad. Inst aq. Transp., v. 151, 8-16.
- Panchurin, N.A. (1964). Friction losses in unsteady laminar flow in pipes. Trudy Leningrad. Inst aq. transp., v. 77, 38-43.
- Melkonian, G.I. (1969). About the friction head in an unsteady fluid flow in the pipeline. Trudy Leningrad. Inst aq. transp., v. 122, 68-73.
- Popov, D.N. (1967). A generalized equation for the shear stress on the pipe wall at the unsteady motion of a viscous fluid. Math. vyssh. Training. institutions. Mechanical Engineering, № 5, 52-57.
- Popov, D.N. (1969). The losses in the pipeline in unsteady fluid motion. Bulletin. mechanical engineering, № 6, 19-20.
- Popov, D.N., Kravchenko, V.G. (1974). The study of unsteady fluid flow transients in a short tube. Bulletin. mechanical engineering, № 6, 7-10.
- Belotserkovskii, P.M. (1975). Almost steady laminar flow of an incompressible fluid in a long cylindrical channel. Science. tr. Inst automation. M-in instrument making., Atomatiz funds. and Control Systems. USSR, V. 7, 69-74.
- Chugai, R.R. (1982). Hydraulics: A Textbook for high schools. L: Energoizdat. Leningrad. Branch, 672.
- Gnatіv, R.M., Vіtruh, І.P. (2009). Eksperimentalnі doslіdzhennya neustalenih techіy in pipes. Promyslova gіdravlіka i pnevmatika, № 4 (26), 28-31.
- Gnatіv, R.M., Petrinets, V.Y, Chernyuk. V.V. (2009). Fіzichnі doslіdzhennya neustalenih potokіv Laser dopplerіvskim vimіryuvachem shvidkostі. News NUVGP, V.3 (47), Part 5, 264-268.
- Chernyuk, V.V. (2004). Vіzualіzatsіya potokіv structured in a circular pipe. Kino-ta fotoreєstratsіya. Promyslova gіdravlіka i pneumatics, № 4 (6), 9-12.
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