Althoughtheprinciplesofoperationofhelicals…, ascompressors or expanders, have been well
known for more than 100 years, it is only during the past 30 years that these machines have …

This study explores the characteristics of twin-screw pumps when operated in turbine, ie,
reverse mode as an alternative to traditional control valves in piping systems for recovering …

Customized grid generation of twin screw machines for CFD analysis is widely used by the
refrigeration and air-conditioning industry today, but is currently not suitable for topologies …

This paper describes some aspects of an advanced grid generation method used, with
Computational Fluid Dynamics (CFD) procedures, to model three‐dimensional flow through …

The most common type of twin screw machines are twin screw compressors. These normally
contain rotors of uniform pitch and profile along the rotor length. However, in some cases …

To optimise a scroll compressor design for better performance and reliability, an
understanding of the detailed mechanism of the unsteady flow inside a scroll compressor is …

Increasing demands for high-performance screw pumps in oil and gas as well as other
applications require deep understanding of the fluid flow field inside the machine. Important …

The internal pressure characteristics of an oil-injected twin-screw refrigeration compressor
was studied using a full 3D CFX model, and the hexahedral moveable meshes of the twin …

Recent interest in natural refrigerants has created a new impetus for studies of CO2 as a
working fluid in vapour compression systems for refrigeration and air conditioning. Two …

Twin-screw compressors are widely used in refrigeration systems, but noise is a serious
problem during operation. Gas pulsation is the main noise excitation source in twin-screw …