This study is concerned with a film cooling technique applicable to the protection of the endwalls of a gas turbine vane. In the experiments, cross-injection coolant flow from two-row, paired, inclined holes with nonintersecting centerlines was utilized. The test model is a scaled two-half vane. The levels of turbulence intensity used in the experiments are T.I. = 1.8%, 7%, and 12%. Other param...

The current work presents the development of a numerical methodology to investigate sliding vane rotary machines by means of advanced design tools such as the Computational Fluid Dynamics ones. Although highly limited in this topic, literature shows that the major constraint for the employment of such approaches is the deformation and motion of the rotor mesh, i.e. the computational grid relate...

R & D Laboratories, DAIKIN INDUSTRIES,LTD. Sakai,Osaka,Japan This paper refers to an improvement of the lubrication in a rolling piston type rotary compressor. The lubrication conditions of lubricated surfaces are examined in running compressor and some parameters of them are numerically analyzed. It is elucidated from the investigation that,when unfavorable condition occurs,the metallic contac...

Numerical analysis for mixed lubrication has been performed in order to investigate the characteristics of sliding surface vane a rotary compressor. The modified Reynolds equation and elastic contact equation, considering roughness, are solved as coupled problem. Using this analysis, investigated by parameter survey on design parameters such vane-slot length clearance between vaneslot. It is fo...

It has been suggested that renin can generate angiotensin I1 at a local vascular level (Thurston & Swales, 1974). For this to occur, angiotensin converting enzyme must also be present. This enzyme occurs predominantly in the vascular bed of the lungs of animals (Vane, 1974), but it has also been shown to occur in the arterial bed of the hind limb of the dog (Aiken & Vane, 1972) and sheep (Osbor...

Male common snipe (Capella gallinago gallinago) produce a 'drumming' sound with their outer tail feathers during their mating dives, but little is known about how this is achieved. We investigated the movements and sound producing capabilities of the outer tail feathers. Using a wind tunnel, we compared observations of the frequencies of sound produced with the predictions from aerodynamic theo...

We have developed a new CO2 heat pump water heater compressor with a single rotary mechanism in practical use for the first time in the world. CO2 refrigerant doesn't destroy the ozone layer, and the global warming potential (GWP) is less than 1/1000 in comparison to hydro-fluorocarbon refrigerants. However the operating pressure of CO2 refrigerant is approximately three times as high as that o...