A momentum integral model for vertical jet in wavy environment

作者：Hu Fei; Chen Yong Ping^*; Xu Zhen Shan; Zhang Chang Kuan

来源：Journal of Hydraulic Engineering, 2013, 44(9): 1058-1063+1070.

• Centerline velocity
• Entrainment effects
• Hydrodynamic characteristics
• Lagrangian methods
• Momentum integral
• Natural coordinates
• Transverse profile
• Wavy environment

A momentum integral model is developed to analyze the hydrodynamic characteristics of a vertical jet discharged into a wavy environment. Natural coordinate system is adopted, and it's assumed that the flow field is instantaneously steady and the transverse profiles of jet velocity are Gaussian-type profile. The model also makes some modification to the entrainment function. By the Lagrangian method and the fourth-order R-K approach, vertical jets in small-amplitude waves are simulated. The results show that the entrainment effect is significantly enhanced, resulting in a wider jet width and a faster decay of centerline velocity, compared to the stagnant conditions. The model findings fit well with the results obtained from the experiments conducted earlier.

• 出版日期2013
• 单位河海大学