Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Numerical Simulation of Ultra-high Speed Supercavitating Flows Considering the Effects of the Water Compressibility
Author: Supercavitation
Author: Igor NesterukPublisher: Springer Science & Business Media
ISBN: 3642236561
Category : Technology & Engineering
Languages : en
Pages : 236
Book Description
This collection is dedicated to the 70th jubilee of Yu. N. Savchenko, and presents experimental, theoretical, and numerical investigations written by an international group of well-known authors. The contributions solve very important problems of the high-speed hydrodynamics,such as supersonic motion in water, drag diminishing, dynamics and stability of supercavitating vehicles, water entry and hydrodynamic performances of hydrofoils, ventilated cavities after a disc and under the ship bottom. The book is written for researches, scientists, engineers, and students interested in problems of hydromechanics.
Numerical and Theoretical Investigation of the High-speed Compressible Supercavitating Flows
Author: Cavitation Instabilities and Rotordynamic Effects in Turbopumps and Hydroturbines
Author: Luca d'AgostinoPublisher: Springer
ISBN: 3319497197
Category : Technology & Engineering
Languages : en
Pages : 288
Book Description
The book provides a detailed approach to the physics, fluid dynamics, modeling, experimentation and numerical simulation of cavitation phenomena, with special emphasis on cavitation-induced instabilities and their implications on the design and operation of high performance turbopumps and hydraulic turbines. The first part covers the fundamentals (nucleation, dynamics, thermodynamic effects, erosion) and forms of cavitation (attached cavitation, cloud cavitation, supercavitation, vortex cavitation) relevant to hydraulic turbomachinery, illustrates modern experimental techniques for the characterization, visualization and analysis of cavitating flows, and introduces the main aspects of the hydrodynamic design and performance of axial inducers, centrifugal turbopumps and hydo-turbines. The second part focuses on the theoretical modeling, experimental analysis, and practical control of cavitation-induced fluid-dynamic and rotordynamic instabilities of hydraulic turbomachinery, with special emphasis on cavitating turbopumps (cavitation surge, rotating cavitation, higher order cavitation surge, rotordynamic whirl forces). Finally, the third part of the book illustrates the alternative approaches for the simulation of cavitating flows, with emphasis on both modeling and numerical aspects. Examples of applications to the simulation of unsteady cavitation in internal flows through hydraulic machinery are illustrated in detail.
Numerical Modeling of Supercavitating Flows
Author: I. N. KirschnerPublisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
Supercavitating bodies can achieve very high speeds under water by virtue of reduced drag: with proper design, a cavitation bubble is generated at the nose and skin friction drag is drastically reduced. Depending on the type of supercavitating vehicle under consideration, the overall drag coefficient can be an order of magnitude less than that of a fully wetted vehicle. Slender-body theory and boundary element methods are two modern computational methods applied to the design of supercavitating vehicles. These course notes present recent advances in the theory behind these two computational approaches, as well as results and application of the methods to the simulation and control of supercavitating vehicles.
Numerical simulation and investigation of high-speed bubble-dynamics in cavitating flow
Author: Eric LauerPublisher:
ISBN: 9783843913584
Category :
Languages : de
Pages : 130
Book Description
Modelling and Simulation of High Speed Supercavitating Vehicle
Author: Santosh BurnwalPublisher: LAP Lambert Academic Publishing
ISBN: 9783848483853
Category :
Languages : de
Pages : 124
Book Description
Supercavitation is an emerging technology in which the most cursed 'Cavitation' is used as a beneficial to engineering application. Supercavitation is achieved when a body moves through water at sufficiently high speed, so that the fluid pressure drops to the water vapour pressure and a vapour bubble (called cavity) envelops the entire vehicle (except the cavitator and fins). Hence, the skin friction drag of the vehicle becomes almost zero. Hence, vehicle can move in the two phase medium.The development of supercavitating vehicle has been confronted with various challenging problems such as the potential instability of the vehicle, the unsteady nature of the cavity dynamics and the complex, non-linear and time delayed nature of the interaction between vehicle and cavity. Moreover depending upon some non dimensional parameter e.g. cavitation number ( ), the equilibrium of the vehicle may shift from a stable equilibrium to a limit cycle."
Numerical Simulation of Steady and Unsteady Cavitating Flows Inside Water-jets
Author: Shu-Hao ChangFundamentals of Cavitation
Author: Jean-Pierre FrancPublisher: Springer Science & Business Media
ISBN: 1402022336
Category : Science
Languages : en
Pages : 321
Book Description
This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth. Cavitation is generated not only in water, but also in any kind of fluid, such as liquid hydrogen. The generation of cavitation can cause severe damage in hydraulic machinery. Therefore, the prevention of cavitation is an important concern for designers of hydraulic machinery. On the contrary, there is great potential to utilize cavitation in various important applications, such as environmental protection. There have been several books published on cavitation, including one by the same authors. This book differs from those previous ones, in that it is both more physical and more theoretical. Any theoretical explanation of the cavitation phenomenon is rather difficult, but the authors have succeeded in explaining it very well, and a reader can follow the equations easily. It is an advantage in reading this book to have some understanding of the physics of cavitation. Therefore, this book is not an introductory text, but a book for more advanced study. However, this does not mean that this book is too difficult for a beginner, because it explains the cavitation phenomenon using many figures. Therefore, even a beginner on cavitation can read and can understand what cavitation is. If the student studies through this book (with patience), he or she can become an expert on the physics of cavitation.
Numerical Simulation of Flow Induced Cavity Resonance
Author: Jake IziksonPublisher:
ISBN:
Category : Cavitation
Languages : en
Pages : 232
Book Description