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Daniele Ricci, Francesco Battista, Manrico Fragiacomo and Ainslie Duncan French
The cooling jackets of liquid rocket engines are composed of narrow passages surrounding the thrust chambers and ensure the reliable operation of the engine. Critical conditions may also be encountered, since the cooling jackets of cryogenic engines, suc...
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D. Bravo, F. González, J. González
Pág. Page 115 - 126
Context: The use of solar energy, rather than an alternative, is the viable solution to the energy demands of our planet for sustainable development. Given the population increase and the quality of life at a global scale, it is very reasonable to foreca...
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Alok K. Mahapatra, Sanjay Sanjay
A computational analysis to investigate the effects of compressor pressure ratio, turbine inlet temperature, ambient relative humidity and ambient temperature on the performance parameters of an air cooled gas turbine cycle with evaporative cooling of in...
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Kefu Wang, Yiqun Ao, Kai Zhao, Tao Zhou and Feng Li
Shaped cooling holes have received considerable attention in recent years due to their potential to improve heat transfer while minimizing pressure drop. In this study, the effects of lobe-shaped cooling holes on film cooling performance and turbulent fl...
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Wanwan Wang and Mengmeng Zhao
Personal cooling garments were reported effective in improving thermal comfort in hot environments. In this study, three liquid?air hybrid cooling garments and one control garment were designed and made: aluminum-tube fan cooling (AAL), silicone-tube fan...
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Qinghua Deng, Huihui Wang, Wei He and Zhenping Feng
The leading edge is the critical portion for a gas turbine blade and is often insufficiently cooled due to the adverse effect of Crossflow in the cooling chamber. A novel internal cooling structure, wall jet cooling, can suppress Crossflow effect by chan...
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Zhou Shen, Beimeng Hu, Guozhan Li and Hongjun Zhang
The effects of the coolant pulsation and the plasma aerodynamic actuation (PAA) on the film cooling are herein explored via large eddy simulations. The electrohydrodynamic force derived from the PAA was solved through the phenomenological plasma model. T...
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Bo Xu, Bing Chen, Jian Peng, Wenyuan Zhou and Xu Xu
To better understand the characteristics of coupled heat transfer in liquid rocket engines, a calculation scheme is proposed in this paper. This scheme can simulate the coupled heat transfer processes, including combustion and flow in the thrust chamber,...
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Paula M. Wenzel and Peter Radgen
Cooling towers remove economically or technically unusable heat using considerable amounts of electricity and, in many cases, water. Several approaches, which vary in methodology, scope, and level of detail, are used for environmental evaluations of thes...
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Anatolijs Borodinecs, Kristina Lebedeva, Natalja Sidenko and Aleksejs Prozuments
Evaporative cooling is widely recognized as an energy efficient and environmentally-friendly air conditioning solution, and it has drawn a lot of market interest in recent years. However, this technology is accompanied by several challenges. For instance...
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João M. S. Dias and Vítor A. F. Costa
This paper presents an adsorption cooler (AC) driven by the surplus heat of a solar thermal domestic hot water system to provide cooling to residential buildings. A cylindrical tube adsorber using granular silica gel as adsorbent and water as adsorbate w...
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Giovanna Barigozzi, Hamed Abdeh, Samaneh Rouina and Nicoletta Franchina
Design of cooling systems for rotor platforms is critical due to the complex flow field and heat transfer phenomena related to the secondary flow structures originating at the blade leading edge. Horseshoe vortex and passage vortex are the fluid-dynamic ...
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Matthew Courtis, Alexander Murray, Ben Coulton, Peter Ireland and Ignacio Mayo
To meet the challenges of increased thermal loads and performance demands on aero-engine turbine blades, more advanced cooling techniques are required. This study used a modification of the well-known Goldstein equation to predict film effectiveness for ...
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Augustin Wambersie, Holt Wong, Peter Ireland and Ignacio Mayo
Panels were tested at different locations around the turbine blade, on both suction and pressure surfaces. Three different surface porosities were also tested. Results demonstrated that the approach can be very successful with high levels of film cooling...
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Ji Hyeok Kim and Joon Ahn
In a field test of a hybrid desiccant cooling system (HDCS) linked to a gas engine cogeneration system (the latter system is hereafter referred to as the combined heat and power (CHP) system), in the cooling operation mode, the exhaust heat remained and ...
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Xiaojun Wu, Xin Du and Chunhua Wang
Film cooling effectiveness can be improved significantly by embedding a round hole in trenches or craters. In this study, film cooling performances of a transverse trench, W-shaped trench and elliptic trench were compared and analyzed in detail. The CFD ...
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Ivan Gospic, Ivica Glavan, Igor Poljak and Vedran Mrzljak
The paper discusses the possibility of applying the trigeneration energy concept (cogeneration + absorption cooling) on diesel-powered refrigerated ships, based on systematic analyses of variable energy loads during the estimated life of the ship on a pr...
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Seung Il Baek and Joon Ahn
The effects of bulk flow pulsations on film cooling in gas turbine blades were investigated by conducting large eddy simulation (LES) and Reynolds-averaged Navier?Stokes simulation (RANS). The film cooling flow fields under 32 Hz pulsation in the mainstr...
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Adil Al-Falahi, Falah Alobaid and Bernd Epple
The electrical power consumption of refrigeration equipment leads to a significant influence on the supply network, especially on the hottest days during the cooling season (and this is besides the conventional electricity problem in Iraq). The aim of th...
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Kamaruddin A., Aep S. Uyun, Alie Bamahry, Rino Imanda
Pág. 51 - 55
Desiccant cooling system has been an attractive topic for study lately, due to its environmentally friendly nature. It also consume less electricity and capable to be operated without refrigerant. A simulation study was conducted using 1.5 m long ducting...
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