NUMERICAL MODELING OF RECIPROCATING FLUID POWER SEALS

Developments in Dry Running Seals for Reciprocating Compressors

Reciprocating compressors of the crosshead design have sealing elements around the piston and piston rod. These seals can be of lubricated or nonlubricated design. This paper will give details about our R&D-work for dry running piston rod sealings or packings for high pressure applications. Starting with an overview of packing design some details are given about tribological tests. Measurements...

Thermal and Fluid Dynamic Behavior of Trans-Critical Carbon Dioxide Hermetic Reciprocating Compressors: Numerical Analysis

Numerical Simulation of the Flow in Magnetic Fluid Rotary Shaft Seals

The hydrodynamical properties of the magnetic fluid in magnetic fluid seals are described by a coupled system of nonlinear partial differential equations in a three-dimensional domain with free boundaries. We propose a reduction of the three-dimensional model and describe the resulting two subproblems, the calculation of new boundaries for given flow and magnetic data, and the computation of th...

Numerical Modeling of Two-Layered Micropolar Fluid Through an Normal and Stenosed Artery

In the present work a two fluid model for blood flow through abnormally constrictedhuman artery (stenosed artery) has been developed. The model consists of a core region of suspensionof all erythrocytes assumed to be micro-polar fluid so as to include the micro-structural effects inaddition to the peripheral-layer viscosity effects, and a peripheral plasma layer free from cells of anykind of Ne...

Hydroelastic Vibration of a Circular Diaphragm in the Fluid Chamber of a Reciprocating Micro Pump

Reciprocating diaphragm micro-pumps are the most common type among indirectly–driven micro-pumps. They operate by reciprocating the diaphragm with associated check valves. This paper addresses the Hydroelastic vibration of circular elastic diaphragm interacting with the incompressible and inviscid liquid inside the cylindrical chamber with a central discharge opening. Taking into account axisym...