EXPERIMENTAL STUDY OF UNSTEADY TRANSCRITICAL FLOW CHARACTERISTICS IN RECTANGULAR CHANNELS

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PARVARESH RIZI A.; KOUCHAKZADEH S.; OMID M.H.

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Journal: JOURNAL OF HYDRAULICS Year:2005 | Volume:1 | Issue:1 Page(s): 29-38

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Title

EXPERIMENTAL STUDY OF UNSTEADY TRANSCRITICAL FLOW CHARACTERISTICS IN RECTANGULAR CHANNELS

Author(s)

PARVARESH RIZI A. | KOUCHAKZADEH S. | OMID M.H. | Issue Writer Certificate

Keywords

TRANSCRITICAL FLOWQ4

UNSTEADY FLOWQ3

BOUNDARY CONDITIONSQ4

MOVING HYDRAULIC JUMPQ4

Abstract

The occurrence of transcriticalor mixed flow, i.e., supercritical and sub critical flow regimes, is considered as a special case of UNSTEADY FLOW in a channel reach, which can clearly be exemplified by a MOVING HYDRAULIC JUMP. Some complexity is inherent in the numerical analysis of TRANSCRITICAL FLOW and published experimental data regarding this kind of flow are rarely available. In this research an experimental setup was prepared to compile the hydraulic characteristics of TRANSCRITICAL FLOW in a rectangular flume. The flume was equipped with a sluice gate at the upstream boundary. Each inflow hydro graph generated unsteady supercritical flow regime at the downstream side of the sluice gate and formed a MOVING HYDRAULIC JUMP along the channel. During each run, the water surface profile was continuously recorded using a pressure transducer. Based on the recorded data, some flow parameters such as flow depth, pressure head and energy head were determined. The result reveals specific relations between the discharge and MOVING HYDRAULIC JUMP parameters. Also, by applying proper assumptions and employing steady state momentum and energy equations simple yet reasonable (and time independent) relations were obtained, that determines the pressure head in subcritical region of unsteady mixed flow. Consequently, having the discharge variation as a boundary condition, one may reliably determine the unsteady TRANSCRITICAL FLOW parameter based on time independent relations.

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APA: Copy

PARVARESH RIZI, A., KOUCHAKZADEH, S., & OMID, M.H.. (2005). EXPERIMENTAL STUDY OF UNSTEADY TRANSCRITICAL FLOW CHARACTERISTICS IN RECTANGULAR CHANNELS. JOURNAL OF HYDRAULICS, 1(1), 29-38. SID. https://sid.ir/paper/124203/en

Vancouver: Copy

PARVARESH RIZI A., KOUCHAKZADEH S., OMID M.H.. EXPERIMENTAL STUDY OF UNSTEADY TRANSCRITICAL FLOW CHARACTERISTICS IN RECTANGULAR CHANNELS. JOURNAL OF HYDRAULICS[Internet]. 2005;1(1):29-38. Available from: https://sid.ir/paper/124203/en

IEEE: Copy

A. PARVARESH RIZI, S. KOUCHAKZADEH, and M.H. OMID, “EXPERIMENTAL STUDY OF UNSTEADY TRANSCRITICAL FLOW CHARACTERISTICS IN RECTANGULAR CHANNELS,” JOURNAL OF HYDRAULICS, vol. 1, no. 1, pp. 29–38, 2005, [Online]. Available: https://sid.ir/paper/124203/en

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