MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Horizontal fanshaped hole
Effect of partial blockage on flow and heat transfer of film cooling
2021年6月1日 For blocked fanshaped holes, the 025D and 05D blockage improved the coolant coverage on the surface, and the averagedlaterally film cooling effectiveness is As for the coordinate system, its origin is at the location where the center axis of the hole CC (Fig 1) meets the horizontal planeGeometry of the fanshaped cooling hole [1]In the louver shaped hole, a strong recirculating zone is generated at the corner by the impingement of the flow on the upper horizontal wall of the hole as shown in Fig 10c, and theSelected shapes of filmcooling hole: a louver, b The fanshaped hole with lateral expansion exhibits the most uniform exit velocity, the widest wake coverage, and the best coolant wall attachment effect, thus possessing the highest A comprehensive comparison of film cooling characteristics of
Effect of particle deposition on film cooling from fanshaped holes
2021年12月1日 The fanshaped hole induces more unstable hairpin vortices and more broken vortices, and the lateral cooling capacity is improved The weaker shear layer vortex and 2012年11月1日 In the present work, numerical analysis has been performed to investigate the filmcooling performance of various filmcooling hole schemes such as fan, crescent, louver, and dumbbellshapedA comparative analysis of various shaped filmcooling In this work, the cooling effectiveness of a fanshaped cooling hole is investigated in crossflow, with and without rotation Contrary to the previous works on the subject, the rotation of the INVESTIGATING THE EFFECTS OF FANSHAPED COOLING HOLE 2021年1月1日 The results show that a smaller straight hole section and a larger backward expansion angle can effectively inhibit the generation of kidneyshaped vortex pairs and Optimization research of film cooling structure with fansharped
Multiobjective optimization of laidback fanshaped film cooling
2018年10月16日 A CFDbased multiobjective optimization is performed for improving the film cooling performance of the laidback fanshaped holes on the suction surface of a turbine guide 2022年9月21日 In this study, the effect of shape variables on the film cooling effectiveness of the compound angled asymmetric laidback fan shaped hole was experimentally investigated, and the optimum values of select design Experimental Optimization of the Compound Angled 2022年4月5日 In order to explore the effect of horizontal position of the fan shaped water mist on the flames, the water mist nozzle was set at 1/4, 2/4 and 3/4 to measure the temperature one time per second in the thermal plume which was at least 80 cm away from the leakage hole The details were shown in Fig 3 The test facility was Experimental study on the effect of fanshaped water mist on horizontal The utility model relates to an electric fan which comprises a vertical oscillating motor (15) and a horizontal oscillating motor (17) The direction of fan blades is controlled by a slide way When the power supply of the vertical oscillating motor is switched on, the rotary shaft of the vertical oscillating motor makes a guide pin which is fixed to the casing of the fan blade motor slide in CNY Electric fan with horizontal and vertical oscillation
Heat transfer characteristics of fanshaped hole effusion cooling
2019年9月1日 Gritsh et al [7] investigated experimentally the local film cooling effectiveness and the heat transfer coefficient in the nearfield of three different film cooling holes (ie a cylindrical hole, a fanshaped hole and a laidback fanshaped holes) at an engine like coolanttomainstream density ratio of DR = 185 over a range of blowing ratios of BR = 025–1752021年10月3日 Film cooling from fanshaped holes is an essential cooling technology in modern gas turbines The cooling performance degradation and life reduction of hightemperature components caused by Effect of particle deposition on film cooling from fanshaped 2021年6月1日 For the fanshaped hole in Fig 12 (e), when the coolant flows through the separation zone in the diffuser section, it shunts both sides of the tube rear vortexes, and rolling vortex develop downstream of the hole and evolve into the horizontal legs, vertical legs, and head of the hairpin vortex, respectively After merging, Effect of partial blockage on flow and heat transfer of film cooling 2016年6月13日 Request PDF Large Eddy Simulation of Inclined Jet in Cross Flow With Cylindrical and FanShaped Holes A large eddy simulation (LES) investigation of the inclined jet in crossflow is presented Large Eddy Simulation of Inclined Jet in Cross Flow With
shows the laidback fanshaped hole geometry and computational
The computational domain is composed of a main channel with a hot gas stream, a coolant channel, and a fanshaped film cooling hole The diameter of the cylindrical part of the hole (D) is 10 mm2022年5月15日 Detailed experimental results were carried out on three different tabs and showed that the horizontal tabs performed best An et al Experimental and Numerical Investigation on the Film Cooling Performance of Cylindrical Hole and Fanshaped Hole with Vortex Generator Fed by Crossflow, by Jie Wang, Chao Zhang, Xuebin Liu Experimental and numerical investigation on the film cooling 2010年7月1日 Fanshaped filmcooling hole shown in Fig 1 is considered in the present problem Threedimensional RANS analyses of the fluid flow and convective heat transfer are conducted by using ANSYSCFX110 [24] which employs an unstructured grid system The solutions are obtained by solving the compressible RANS equation through the finitevolume Shape optimization of a fanshaped hole to enhance filmcooling 2024年3月26日 Horizontal paddle ceiling fans, also known as horizontal blade ceiling fans or propeller ceiling fans, are a modern twist on traditional ceiling fan designs Unlike traditional fans with vertical blades, horizontal paddle fans Horizontal Paddle Ceiling Fans: A Stylish and
The effects of manufacturing tolerance on the film cooling
2022年3月30日 In modern gas turbines, film cooling have been widely applied to protect components from hot combustion gas Recently, a laidback fanshaped hole has been widely applied due to its high cooling performance Generally, the cylindrical and diffuser components of the laidback fanshaped hole are fabricated in separate manufacturing processes, and the 2022年10月27日 In this study, the effect of shape variables on the film cooling effectiveness of the compound angled asymmetric laidback fan shaped hole was experimentally investigated, and the optimum values of Experimental Optimization of the Compound Angled 2021年3月2日 For this purpose, large eddy simulations (LESs) of the 777 fanshaped cooling hole are performed and the flow inside the cooling hole is studied and discussed Use of mathematical techniques such as the fast Fourier transforms (FFTs) and dynamic mode decomposition (DMD) is done to quantitatively access the flow modal structure inside the hole Analysis of the Unsteady Flow Field Inside a FanShaped Cooling Hole 2016年11月1日 To improve the cooling performance, shape optimization of a fanshaped film cooling hole was carried out Three geometric parameters, including incline angle, lateral expansion angle and hole length, were selected as the design parameters Numerical model of the film cooling system was established, validated, and used to generate training samplesOptimization of a fanshaped hole to improve film cooling performance
Large Eddy Simulation of Film Cooling Flow from A Fanshaped Hole
2017年10月1日 The baseline cooling hole was a 777 laidback fanshaped hole, where this hole is located at a flat plate surface with a pitchwise spacing of 6D, and the hole was inclined at 30degrees with 2012年11月1日 In the present work, numerical analysis has been performed to investigate the filmcooling performance of various filmcooling hole schemes such as fan, crescent, louver, and dumbbellshaped holesA comparative analysis of various shaped filmcooling holesAs research on laidback fanshaped hole film cooling deepens, operating conditions become increasingly complex, including the effects of unsteady wake and free and laidback fanshaped holes, with their focus on the horizontal slots at the film cooling hole inlets, finding that these slots generally enhance cooling performance Chen A comprehensive comparison of film cooling characteristics of shaped 2024年5月18日 In the development of CBM wells, Lshaped, Ushaped and multibranch horizontal wells are usually used for new exploration and development blocks (defined here as new fields or area blocks in the Research on trajectory control technology for Lshaped horizontal
Effect of partial blockage on flow and heat transfer of film cooling
2021年6月1日 Large eddy simulation is used to study the effect of partial blockage on the film cooling characteristics of cylindrical and fanshaped holes at the blowing ratio of M=052023年12月1日 Chen et al [21] studied particle deposition in fanshaped hole film cooling via large eddy simulation and observed a close relationship between particle deposition, blowing ratio, and film cooling effectiveness with a horizontal distance of ∼348 mm from the leading edge of the cooling hole (56D)Unveiling particle deposition characteristics on flat plate with a 2022年5月5日 Zamiri et al [12] optimized a fanshaped hole with large eddy simulation (LES) flow solver, which is a very pioneering work of high fidelity optimization The trend of the variable H is horizontal straight and does not have an evident impact on the average effectiveness in the entire value range, Surrogatebased optimization and experiment validation of a fanshaped 2023年8月2日 Figure 1 shows the geometries of the two film cooling holes used in this study: the fanshaped hole and the cylindrical hole At x / D = 5 , the confinement provided by the jet disappears, because the jet becomes nearly horizontal and gradually mixes with the freestreamBudgets of Reynolds stresses in film cooling with fanshaped and
Large Eddy simulation in optimizing trench configuration to
2023年10月1日 Fig 2 (a) and (b) show the computational domain of the cooling hole with and without a trench slot, respectively The numerical domain consisted of three main parts: a 10 D × 12 D × 6 D rectangle box as the plenum chamber for the coolant flow, a fanshaped cooling hole, and a 100 D × 20 D × 6 D rectangle box as the mainstream passage Since the mainstream 2023年11月1日 Fig 2 shows the detailed geometrical structure of the laidback fanshaped hole A typical “777 shaped hole” was employed in this paper [37]The forward expansion angle and the lateral expansion angle were all 7° Therefore, the full expansion angle in Effects of dislocations on film cooling effectiveness of a laidback fan 2022年5月19日 The application of hole cleaning devices can effectively solve the hole cleaning problem during the drilling of horizontal wells Improving the hole cleaning performance is directly related to subsequent drilling time and cost In this paper, the solid–liquid twophase hydrodynamic characteristics under the action of the Vshaped hole cleaning device for drilling Hole Cleaning Performance of VShaped Hole Cleaning Device in is to reveal the mechanism of spiral flow induced by the V‐shaped hole cleaning device and its influence on the hole cleaning effect, which is a significant reference for the struc‐ tural optimization and improvement of the V‐shaped hole cleaning device 2 Methodology 21 Governing EquationsHole Cleaning Performance of V Shaped Hole Cleaning Device in
Effect of film hole geometry and blowing ratio on film cooling
2020年1月25日 Goldstein et al [1] conducted experiments to explore the hole geometry, flow density and mainstream boundary layer thickness The results showed the shaped hole improved the effectiveness than the cylindrical hole Bunker [2], [3] investigated the cooling mechanism He put forward the systematic review of several kinds of film holes2024年1月5日 The laidback fanshaped hole was found to improve both the film coverage and the heat transfer coefficient in the nearhole region Jiang et al [14] compared the adiabatic effectiveness and NHFR of four shaped holes on the pressure side, leading edge and suction side of a guide vaneEffects of structural parameters of laidback fanshaped hole on 2007年6月1日 A recent optimization study (Park et al, 2019) found that increasing the forward and lateral expansion angles and decreasing the metering length of laidback fanshaped coolant hole independently (PDF) Influence of hole shape on the performance of a turbine 2022年6月21日 Results of physical and mechanical properties of 609 horizontal ore and rock In fanshaped deep hole blasting, the boulder yield is relatively high How to takeParameter Optimization and Fragmentation Prediction
(PDF) Advanced Hole Cleaning in Horizontal Wells:
2023年3月7日 In this paper, the solid–liquid twophase hydrodynamic characteristics under the action of the Vshaped hole cleaning device for drilling horizontal wells were studied experimentally and 2022年6月21日 For SanXin gold and copper mine, deep blasting large block rate is high resulting in difficulty in transporting the ore out; secondary blasting not only increases blasting costs but is more likely to cause the top and bottom Parameter Optimization and Fragmentation Prediction 2018年8月28日 An experimental investigation of the geometrical parameter effects on the film cooling performance of a fanshaped hole was conducted on a low speed flatplate facility The pressure sensitive paint (PSP) technique and steady liquid crystal (SLC) technique were employed to determine the adiabatic film cooling effectiveness and heat transfer coefficients, A Novel Method for Designing FanShaped Holes With Short 2020年11月1日 Three kinds of holes (Cylindrical Hole (CH), FanShaped Hole (FSH), and CraterShaped Hole (CSH)) are taken into consideration The SDR shows an inherent affecting mechanism on the mutual (PDF) Improvement on shapedhole film cooling effectiveness by
Effects of the laidback fanshaped hole geometry on film cooling
2020年1月1日 Four kinds of film cooling holes, the cylindrical hole, the fanshaped hole, the double jet holes and the hole with sister holes were studied with blowing ratio varied from 03 to 152022年5月15日 Aiming at investigating the effects of crossflow and vortex generator on film cooling characteristics of cylindrical hole and fanshaped hole, the film cooling performance of four different structures was measured experimentally by infrared camera The blowing ratio varies from 05 to 2 The Reynolds number of the mainstream based on the hole diameter remains at Experimental and numerical investigation on the film cooling ADVERTISEMENTS: Folds show a great variety of forms; some may be quite simple, whereas others may be highly complex and complicated in their geometry and morphology In fact, in most cases folds may be simple or complex modifications of two basic types of folds: i Anticlines and ADVERTISEMENTS: ii Synclines i Anticlines: Anticlines are defined []Classification of Folds Rocks Geology Geography Notes2019年12月1日 Researchers have tried to improve film cooling effectiveness through the use of fanshaped holes It was shown that fanshaped holes could distribute coolant more uniformly in a lateral direction than cylindrical holes, and resulted in higher film cooling effectiveness [6], [7], [8]Coolants with higher density ratio further improved the film cooling effectiveness of fan Experimental optimization of a fanshaped film cooling hole
The characteristics and divergence of fanshaped and
2019年8月1日 The film cooling effectiveness of fanshaped hole increases with density ratio, while the cylindrical hole is not sensitive to the variation in density ratio (2) The results show that fanshaped holes have better film cooling effectiveness at low blowing ratios when the rotation speed was 600 rpm compared with cylindrical holes