CFD analysis of a hydraulic valve for cavitating flow

Author:

Dutta A.1,Goyal P.1,Singh R. K.1,Ghosh A. K.1

Affiliation:

1. 1 Reactor Safety Division, Bhabha Atomic Research Centre Mumbai, India.

Abstract

AbstractA successful design of high pressure hydraulic valves requires a thorough analysis of both velocity and pressure fields, with the aim of improving the geometry to avoid cavitation. Cavitation behavior prediction of hydraulic valves and its associated performance drop is of high interest for the manufacturers and for the users. The paper presents a CFD analysis of the flow inside a high pressure hydraulic valve. First, the analysis was carried out without using cavitation model (single phase). It was observed that absolute pressure was going below the vapor pressure. Hence, it was required to turn on the cavitation model. This model enables formation of vapor from liquid when the pressure drops below the vaporization pressure. Since the cavitation bubble grows in a liquid at low temperature, the latent heat of evaporation can be neglected and the system can be considered isothermal. Under these conditions the pressure inside the bubble remains practically constant and the growth of the bubble radius can be approximated by the simplified Rayleigh equation. For typical poppet valve geometry, ½ of computational domain is assumed, with pressure inlet and outlet boundary conditions, and a steady flow solution is computed. Because of the highly complex geometry of the hydraulic valve, the computational domain was meshed using unstructured grids using tetrahedral cells only. The paper presents a numerical investigation of the flow inside a hydraulic valve using commercial CFD code CFD-ACE. The aim of the study is to provide a good basis for future designing of the hydraulic valve. The result indicated the cavitation zones which in turn suggest needs of modification of present geometry.

Publisher

Walter de Gruyter GmbH

Subject

Safety, Risk, Reliability and Quality,General Materials Science,Nuclear Energy and Engineering,Nuclear and High Energy Physics,Radiation

Reference20 articles.

1. Acosta, A. J.: Cavitation and Fluid Machinery. Proc. of Cavitation Conference, 1974, Heriot-Watt Univ. of Edinburgh, Scotland, pp. 383–396

2. Simulations of Cavitating Flows Using Hybrid Unstructured Meshes

3. Cavitation in Fluid Machinery and Hydraulic Structures

4. Observations of the dynamics and acoustics of travelling bubble cavitation

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