Download or read book Film Cooling Measurements with a Transverse Gap Downstream of the Injection Holes written by Yufeng Yu and published by . This book was released on 1993 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASME Technical Papers written by and published by . This book was released on 1999 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of a Leaking Gap Downstream of the Injection Holes on Film Cooling Performance written by Y. Yu and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine and Aeroengine Congress &Exhibition Birmingham, UK - June 10-13, 1996.

Download or read book Influence of Gap Leakage on the Film Effectiveness and Heat Transfer Around Discrete Injection Holes written by Yue Cheng Hsing and published by . This book was released on 1997 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research has been performed to investigate the heat transfer characteristics of cooling film over a misaligned leaking gap, using a thermographic phosphor fluorescence imaging technique. Such a flow pattern is usually seen on the component-to-component interface of inlet guide vanes in a gas turbine system. This problem can be classified as a four-temperature problem. The present study defines a true driving potential of the convective heat transfer of a four-temperature system. Experiments are performed systematically to investigate problems of traditional film cooling, the gap leakage together with a misaligned interface effect, and finally, a combined four-temperature system. The result of current film cooling studies reveals a comparable agreement with that found in open literature using conventional measurement techniques. The same conclusion is obtained for a gap leakage study at an aligned interface circumstance. Another finding of the gap leakage study is that the cooling performance in a backward-facing step is the best among all misaligned interface situations. For a four-temperature situation, the flowfield changes significantly in the presence of a leaking gap downstream of film-cooling jets or vise versa. The cooling performance of each coolant injection is either enhanced or degraded, depending on the ratio of the blow strength the first coolant film to that of the second. The misaligned interface effect lessens when the ratio is smaller than one. In contrast to the gap leakage results, the forward-facing step situation presents the best film effectiveness distribution. Generally, the cooling performance is decreased when film-cooling jets re revealed upstream of a gap leakage. The effect is opposite when a leaking gap is located upstream.

Download or read book Flow Visualization of Discrete hole Film Cooling with Spanwise Injection Over a Cylinder written by Louis M. Russell and published by . This book was released on 1979 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect on Gaseous Film Cooling of Coolant Injection Through Angled Slots and Normal Holes written by S. Stephen Papell and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Film Cooling on a Convex Wall written by Kokichi Furuhama and published by . This book was released on 1983 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Film Cooling Effectiveness and Heat Transfer with Injection Through Holes written by Vernon Lee Eriksen and published by . This book was released on 1971 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Hole Length Supply Plenum Geometry and Freestream Turbulence on Film Cooling Performance written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental measurements are presented in this report to document the sensitivity of film cooling performance to the hole length and coolant delivery plenum geometry. Measurements with hot-wire anemometry detail velocity, local turbulence, and spectral distributions over the exit plane of film cooling holes and downstream of injection in the coolant-freestream interaction zone. Measurements of discharge coefficients and adiabatic effectiveness are also provided. Coolant is supplied to the film cooling holes by means of a large, open plenum and through plenums which force the coolant to approach the holes either co-current or counter-current to the freestream. A single row of film cooling holes with 35 degree-inclined streamwise at two coolant-to-freestream velocity ratios, 0.5 and 1.0, is investigated. The coolant-to-freestream density ratio is maintained in the range 0.96 to 1.0. Measurements were taken under high-freestream (FSTI = 12%) and low-freestream turbulence intensity (FSTI = 0.5%) conditions. The results document the effects of the hole L/D, coolant supply plenum geometry, velocity ratio, and FSTI. In general, hole L/D and the supply plenum geometry play influential roles in the film cooling performance. Hole L/D effects, however, are more pronounced. Film cooling performance is also dependent upon the velocity ratio and FSTI. Burd, Steven W. and Simon, Terrence W. and Thurman, Douglas (Technical Monitor) Glenn Research Center NAG3-1638; RTOP 714-01-4A...

Download or read book Film Cooling of Curved Surfaces written by Stephen Gregg Schwarz and published by . This book was released on 1986 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stagnation Region Gas Film Cooling written by D. W. Luckey and published by . This book was released on 1981 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Hole Length Supply Plenum Geometry and Freestream Turbulence on Film Cooling Performance written by and published by . This book was released on 2000 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Numerical Study of Discrete hole Film Cooling written by Mulugeta K. Berhe and published by . This book was released on 1997 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Full coverage Film Cooling 3 dimensional Measurements of Turbulence Structure and Prediction of Recovery Region Hydrodynamics written by S. Yavuzkurt (et al) and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrodynamic measurements were made with a triaxial hot-wire in the full-coverage region and the recovery region following an array of injection holes inclined downstream, at 30 degrees to the surface.

Download or read book Measurements in Film Cooling Flows with Lateral Injection written by Richard W. Kaszeta and published by . This book was released on 1998 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coupled Usage of Discrete Hole and Transpired Film for Better Cooling Performance written by Michael C. Torrance and published by . This book was released on 2012 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coupled geometries feature 13 film holes of 7.5mm diameter and a transpiring strip 5mm long in the streamwise direction. The first coupled geometry features the porous section upstream of the film holes and the second features it downstream. Both geometries use the same crushed aluminum porous insert of nominal porosity of 50%. Temperature sensitive paint along with an 'adiabatic' Rohacell surface (thermal conductivity of 0.029W/m-K) are used to measure adiabatic film cooling effectiveness using a scientific grade high resolution CCD camera. The result is local effectiveness data up to 50 film hole diameters downstream of injection location. Data is laterally averaged and compared with the baseline cases. Local effectiveness contours are used to draw conclusions regarding the interactions between transpiration and discrete hole film cooling. It is found that a linear superposition method is only valid far downstream from the injection location. Both coupled geometries perform better than transpiration or the discrete holes far downstream of the injection location. The coupled geometry featuring the transpiring section downstream of the film holes matches the transpiration effectiveness just downstream of injection and surpasses both transpiration and film cooling further downstream.

Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: