Open AccessMathematical simulation of air-water flow along Ski Jump Jet
Author(s) -
Roghayeh Ahmadpour,
Hamed Sarkardeh,
Hazi Mohammad Azamathulla
Publication year - 2021
Publication title -
water supply
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 39
eISSN - 1607-0798
pISSN - 1606-9749
DOI - 10.2166/ws.2021.293
Subject(s) - froude number , hydraulic jump , mechanics , jump , jet (fluid) , momentum (technical analysis) , flow (mathematics) , environmental science , meteorology , mathematics , physics , finance , quantum mechanics , economics
In the present study, using a quasi 3D analytical simulation, air concentration distribution in ski jump generated jet is calculated. A numerical simulation is also performed to verify the results of the analytical model in parallel with the available experimental and other analytical data. By solving continuity and momentum equations in the case of air-water flow for three different cases, it was confirmed that the air concentrations along the ski jet are uniquely linked to the relative black water core length. Results showed that the black water core length is also influenced by the approach flow depth, Froude number, geometrical parameters of ski jump and the chute bottom angle. Finally, an analytical equation is proposed to predict the air concentration distribution along the ski jump jet regarding different hydraulic and geometric parameters. By calculating the velocity profiles along the jet, it showed that increasing the air concentration reduces the jet velocity profile.