Simulation of Axisymmetric Jet Issuing from a Nozzle with Collar
スポンサーリンク
概要
- 論文の詳細を見る
The evolution of a round turbulent jet issuing from a nozzle with a collar is simulated by using a discrete vortex method under the constraint of axial symmetry. The vortex sheets shed from the nozzle and the edge of the collar are represented by vortex ring elements. The collar is represented by vortex rings of appropriate strengths to satisfy the no-through-flow condition. The effect of the collar on the development of the jet shear layer is investigated with and without harmonic excitation. When harmonic excitation in the range of St=0.3 to 0.7 is applied to the model jet issuing from a nozzle without a collar, large-eddy structures corresponding to the frequency of the excitation are formed. When St≧0.5, these eddies coalesce immediately and are converted into eddies of St/2. The evolution of the jet shear layer is greatly affected by the collar. The preferred frequency varies with the dimensions of the collar.
- 一般社団法人日本機械学会の論文
- 1995-02-15
著者
-
Shimizu Seiji
Department of Cardiology, Anjo Kosei Hospital
-
Shimizu Seiji
Department Of Mechanical Engineering Hiroshima Institute Of Technology
-
Shimizu Seiji
Department of Mechanical Engineering, Hiroshima Institute of Technology
関連論文
- 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
- 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