Discharge Phenomena of a Two-Dimensional Poppet-Type Valve

نویسندگان

  • C. Y. Tsui
  • C. C. Oliver
چکیده

A model which describes the discharge phenomena of a two-dimensional poppe·t-type valve is developed which correlates well with experimental measurements. The flow regime is divided into two regions: an inner one where the flow can be considered as inviscid and an outer one with ·turbulent jet flow characteristics. The pressure distribution along the valve is also investigated. The results indicate that the discharge phenomena can be predic·ted as a function of the geometry of the valve assembly studied.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Numerical Simulation of an Unsteady Axisymmetric Flow in a Poppet Valve Using a Vortex Method

In the present study, numerical simulations of the ow in a three-dimensional axisymmet-ric poppet valve are conducted using a vortex method. The uids are assumed inviscid and incompressible. The vibration of the poppet, supported by a spring and a dash pot, occurs in the axial direction in some range of parameters. The numerical simulations are carried out by varying systematically the paramete...

متن کامل

Photoelastic stress analysis of silastic poppets in prosthetic heart valves.

Some prosthetic heart valves with Silastic ball poppets undergo degeneration and variance. The problem is avoided with metal poppets; however, their impact can damage the cloth coverings on the struts, resulting in distorted blood flow paths. Consequently, renewed interest in mOd-cured Silastic poppets and inserts is developing. With photostress equipment, we analyzed two spherical poppet model...

متن کامل

Dynamic Behaviour of Hydraulic Pressure Relief Valve

This paper discusses the influence of the radial clearance of the poppet of the direct spring operated pressure relief valve type DPRS06K315 on the dynamic behaviour of the valve. The mathematical model of the valve has been developed; these mathematical terms have been represented in Matlab/SIMULINK. The results obtained by a simulation describe dynamic behaviour of the valve and its influence...

متن کامل

On the Static Instability of Liquid Poppet Valves

This paper focuses on flow induced static instabilities occurring in poppet valves. Computational fluid dynamics simulation were performed to gain static characteristics of the poppet valve and to demonstrate the unstable behaviour of the valve. Based on theoretical considerations, a necessary condition for the stable operation is derived. The study indicates that stability can be obtained with...

متن کامل

Effect of Valve Port Gas Inertia on Valve Dynamics - Part I: Simulation of a Poppet Valve

T. J. Trella, U.S. Department of Transportation, Transportation Systems Center, Cambridge, Massachusetts 02142 and A theoretical model was developed of the nonlinear dynamic response of a reciprocating air compressor discharge valve system considering unsteady flow. It constitutes an extension of previous modeling procedures where the flow was considered in a quasi steady manner. The most simpl...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014