Numerical simulations of cavitating flow

Ing. Hiren Narendrakumar Rashiwala

Diplomová práce

Abstract:

The diploma thesis is focused on the numerical and experimental analysis of cavitating flow on NACA profile 2412. The rectangular section of 150x 150 x 500 mm placed in closed loop cavitation tunnel is used for the simulation and for the measurement. The experimental profile is equipped with PVDF films used for the detection of the interaction between the cavitating flow and the profile surface. The corresponding surfaces are prepared on the numerical model to compare the force interaction. The goal of the work is to investigate the erosion potential both experimentally and numerically. The results of the flow visualization from the experiment and the corresponding flow contours in numerical analysis are compared. The erosion potential is evaluated from the number of impacts and its forces. The results of Impact forces show good agreement between the simulation and the experiment by histograms and by frequency analysis.

Abstract:

The diploma thesis is focused on the numerical and experimental analysis of cavitating flow on NACA profile 2412. The rectangular section of 150x 150 x 500 mm placed in closed loop cavitation tunnel is used for the simulation and for the measurement. The experimental profile is equipped with PVDF films used for the detection of the interaction between the cavitating flow and the profile surface. The corresponding surfaces are prepared on the numerical model to compare the force interaction. The goal of the work is to investigate the erosion potential both experimentally and numerically. The results of the flow visualization from the experiment and the corresponding flow contours in numerical analysis are compared. The erosion potential is evaluated from the number of impacts and its forces. The results of Impact forces show good agreement between the simulation and the experiment by histograms and by frequency analysis.

Keywords

Cavitation, Bubble collapse, Cavitation Erosion, NACA 2412, CFD Simulation

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 23. 5. 2017

Obhajoba závěrečné práce

• Obhajoba proběhla 15. 6. 2017
• Vedoucí: Ing. Miloš Müller, Ph.D.

Technická univerzita v Liberci

Fakulta strojní

Magisterský studijní program / obor:
Mechanical Engineering / Machines and Equipment Design