Numerical Simulation of Cavitating Water Jet by a Compressible Mixture Flow Method

スポンサーリンク

概要

• 論文の詳細を見る

• Concerned on the numerical simulation of high-speed water jet accompanied with intensive cavitation, a practical compressible mixture flow method is developed by coupling a simplified estimation of bubble cavitation and a flexible compressible flow computation procedure. Two-phase fluid media of cavitating flow are treated as a mixture of liquid and bubbles, and the mean flow of the mixture is computed by applying Reynolds Averaged Navier-Stokes equations for compressible fluids considering the effect of bubble expansion a/o contraction. The intensity of cavitation is evaluated by gas volume fraction which is governed by the compressibility of bubble-liquid mixture at the current status of mean flow field. High-speed submerged water jets issuing from a convergent-divergent nozzle are treated under different cavitation conditions. The results demonstrate that pressure decreases in the convergent section and cavitation occurs initially in the low-pressure region behind the throat near the wall. The gas volume fraction of cavitation bubbles reaches to 0.5 locally when the cavitation number is decreased to 0.1, and cavitation bubbles generated in the shear layer near the throat flow downstream along the jet periphery. Under the effect of cavitation bubbles the mass discharge coefficient of water jet decreases obviously compared to the case of no-cavitating one although the maximum velocity at the throat increases.

• 一般社団法人 日本機械学会の論文

著者

• FUJIKAWA Shigeo

  Graduate School of Engineering, Hokkaido University

• Shimizu Seiji

  Department of Cardiology, Anjo Kosei Hospital

• Peng Guoyi

  Department Of Mechanical Systems Engineering Faculty Of Engineering Toyama Prefectural University

• SHIMIZU Seiji

  Department of Mechanical Engineering, College of Engineering, Nihon University

関連論文

• Cavitation Bubbles Mediated Molecular Delivery During Sonoporation
• Numerical Simulation of a Sessile Bubble beneath a Horizontal Solid Wall in Liquid : Surfaces, Interfaces, and Films
• An Improved CIP-CUP Method for Submerged Water Jet Flow Simulation
• Myocardial Ischemia During Percutaneous Transluminal Coronary Angioplasty in Patients With Rich Collateral Circulation of the Target Lesion
• Large molecules in high-intensity laser fields
• Acceleration of Abrasive Particles in Premixed Abrasive Water Jet Nozzle
• NUMERICAL STUDY OF CAVITATING VORTEX FLOW IN STARTING SUBMERGED WATER JET(Water Jet)
• A patient with rectal cancer associated with ulcerative colitis in whom endoscopic ultrasonography was useful for diagnosis
• Endoscopic Ultrasonography in Ischemic Colitis
• Simulation of Axisymmetric Jet Issuing from a Nozzle with Collar
• ENDOSCOPIC ULTRASONOGRAPHY IN DETERMINING THE INDICATIONS FOR ENDOSCOPIC RESECTION IN EARLY COLORECTAL CANCER
• Numerical Simulation of Cavitating Water Jet by a Compressible Mixture Flow Method
• Instantaneous Photographic Observation of Abrasive Water Suspension Jets : Influence of Abrasive Particle on Jet Structure

もっと見る 閉じる

スポンサーリンク