Engineer of the Turbomachinery Laboratory at Mitsubishi Heavy Industries, Ltd., in Takasago, Japan. He has been involved in the design and development of turbomachinery compressors and expanders as well as combustors and chemical reactors. He is currently engaged in aerodynamic design and testing of special purpose turbomachinery. Mr. Yagi holds B.S. and M.S. degrees from the University of Toky...

This article provides a summarizing account of the results obtained in current collaborative work four research institutes concerning near-wall flow turbomachinery. Specific questions regarding influences boundary layer development on blades and endwalls as well loss mechanisms due to secondary are investigated. These address skewness, periodical distortion, wake interaction heat transfer, amon...

The present work reports an experimental study of the leakage flow in a low-speed fan ring. Existing 2D Particle Image Velocimetry (PIV) measurements taken meridional plane front rotor gap have been further processed and analyzed by means Proper Orthogonal Decomposition (POD). Three values dimensionless pressure rise across investigated. Namely, attention has focused on intermediate case—the on...

The mixing-plane method for calculating the three-dimensional flow through multistage turbomachinery is used to perform flutter analysis on a single stage transonic compressor. The turbomachine considered is composed of an inlet guide vane (IGV) and a compressor blade (NASA Rotor 67). The mixing-plane boundary condition enables steady and unsteady computation of the flow through multiple blade ...

A straight-through labyrinth seal is one of the most popular non-contacting annular seals through which energy dissipation by turbulence viscosity interaction achieved with a series teeth and cavities. The geometric parameters seal, such as clearance, tooth width, height, cavity inclination angle, affect its performance. space for installing in turbomachinery limited, so it important to optimiz...

Computational Fluid Dynamics is one of the most relied upon tools in design and analysis components turbomachines. From propulsion fan at inlet, through compressor combustion sections, to turbines outlet, CFD used perform fluid flow heat transfer analyses help designers extract highest performance out each component. In some cases, such as point axial compressor, current methods are capable del...

following recent works of several authors like huilgol, bhattacharya etd. and javadpour et al., this paper is to contribute further to the literature of axial flow in a rotational coaxial rheometer. we consider axial flow of herschel bulkley mode1 between two concentric cylinders with the inner one rotating, while the outer cylinder is held stationary. an attempt has been made to direct the ana...

Design models of multi- stage, axial flow compressor are developed for gas turbine engines. Axial flow compressor is one of the most important parts of gas turbine units. Therefore, its design and performance prediction are very important. One-dimensional modeling is a simple, fast and accurate method for performance prediction of any type of compressors with different geometries. In this appro...

With the demand for turbomachinery to operate at higher speeds, loads, and power, fluid film bearings that support turbomachinery must be capable of operating in these more demanding applications. Thrust bearings operating at high speeds and loads can experience high surface temperatures and thin fluid film thickness. Typically, babbitt (white metal) is the bearing lining material for most turb...

there are different methods used for threshing of grain crops. usual threshers operate based on the impact force (in threshing unit) that may damage the grains. in another method named axial-flow, grain damage is less so these types of the harvesting machines are being used more than before. in this study one of the common rice threshers (model t30) locally made in ashtad company was modified t...