The most emerging needs of the modern metal cutting operation are to increase the material removal rate with better surface finish and high machining accuracy. These objectives can be achieved by reducing cutting temperature in the cutting zone. In metal cutting process, high cutting temperature and its detrimental effects are generally reduced by proper selection of process parameters, proper ...

An investigation is conducted to assess the thermal performance of multi-layered screen laminates when used as extended surface matrices (ESM’s) in vertical up-flow boiling. A dielectric coolant (FC-72) is used as the working fluid. Four specimens are constructed having different mesh-geometries and/or number of layers. Channel Reynolds numbers are varied from 2700 to 8500 and ESM base superhea...

A new acoustical sensing system for the nuclear power industry has been developed at The Pennsylvania State University in collaboration with Idaho National Laboratories. This sensor uses the high temperatures of nuclear fuel to convert a nuclear fuel rod into a standing-wave thermoacoustic engine. When a standing wave is generated, the sound wave within the fuel rod will be propagated, by acous...

Thermosiphon (TC) is an evaporative-condensing heat exchange device, where the circulation of working fluid (intermediate coolant) carried out due to gravitational forces. There no porous wick in thermosiphons, it replaced by grooves various geometric shapes. Structurally, thermosiphons are made form hermetically sealed and elongated cylindrical vessels, inner volume which filled with a fluid. ...

Turbine blade cooling is considered as the most effective way of maintaining high operating temperature making use of the available materials, and turbine systems with wet compression have a potential for future power generation because of high efficiency and high specific power with a relatively low cost. In this paper performance analysis of wet-compression gas turbine cycle with turbine blad...

This paper investigates the experimental program on the study of heat transfer characteristics in micro-channels. The two test sections used are of 47 and 50 micro-channels in rectangular cross-section of equivalent diameters 387 and 327 μm respectively. Each channel of length 192 mm is fabricated on a 304 stainless steel substrate (230 mm x 160 mm x 1.6 mm) by photo chemical etching process. C...

Abstract This research studies a three-dimensional fluid flow, and heat transfer in the sink numerically using air as coolant. The numerical effects of number fins their thickness on performance are investigated Ansys Icepak. Various fin numbers thicknesses used to check sink’s optimal thermal performance. results demonstrated that maximum temperature, pressure drop, resistance decrease with in...

This paper presents results of experimental investigations on natural esters dielectric and coolant fluids regarding the breakdown strength. The breakdown voltage (BDV) for small and medium oil gaps (from 2 mm up to 40 mm) under AC and lightning impulse (LI), uniform and non-uniform electrical field is measured. Experiments involve new, aged and with mineral oil contaminated natural esters. The...

Abstract The trailing edge (TE) design of a cooled high-pressure (HP) nozzle guide vane (NGV) requires consideration both cooling and aerodynamic performances. Two designs are in common use: the centered-ejection design, which coolant is ejected through slot TE with roughly symmetrical suction-side (SS) pressure-side (PS) tips; SS-overhang SS PS tips staggered. This second has been favored rece...