Topic
Gas compressor
About: Gas compressor is a research topic. Over the lifetime, 91817 publications have been published within this topic receiving 552209 citations.
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Patent•
05 Jun 2003
TL;DR: In this paper, the authors define a charged internal combustion engine having at least one stage of charging by a turbocharger, and a drive independent from the working medium cycle of the engine.
Abstract: A charged internal combustion engine (1) having at least one stage of charging by a turbocharger (3), in which at least one supplemental compressor (4) is connected parallel to or in series with the turbocharger, and in which the supplemental compressor (4) has a drive independent from the working medium cycle of the internal combustion engine.
66 citations
Patent•
04 Mar 1988TL;DR: In this article, saddle-shaped members are formed between the transition ducts and saddle shaped members which direct the flow of air from the compressor over the outer surfaces of the ducts.
Abstract: In a gas turbine the transition duct is subject to high temperature since it conducts the combustion products to the power turbine It is normally cooled by air from the compressor This invention improves the uniformity of cooling by forcing the cooling air to pass over all surfaces of the transition duct Air flow passages are formed between the ducts and saddle shaped members which direct the flow of air from the compressor over the outer surfaces of the ducts
65 citations
TL;DR: In this paper, an ejector cooling cycle is driven by the waste heat from the condenser in the vapor compression refrigeration cycle and the additional cooling capacity from the ejector cycle is directly input into the evaporator of the VCC cycle.
Abstract: A refrigeration system was developed which combines a basic vapor compression refrigeration cycle with an ejector cooling cycle. The ejector cooling cycle is driven by the waste heat from the condenser in the vapor compression refrigeration cycle. The additional cooling capacity from the ejector cycle is directly input into the evaporator of the vapor compression refrigeration cycle. The governing equations are derived based on energy and mass conservation in each component including the compressor, ejector, generator, booster and heat exchangers. The system performance is first analyzed for the on-design conditions. The results show that the COP is improved by 9.1% for R22 system. The system is then compared with a basic refrigeration system for variations of five important variables. The system analysis shows that this refrigeration system can effectively improve the COP by the ejector cycle with the refrigerant which has high compressor discharge temperature.
65 citations
TL;DR: In this article, a new integrated power generation system driven by the solid oxide fuel cell (SOFC) is proposed to improve the conversion efficiency of conventional energy by using a Kalina cycle to recover the waste heat of exhaust from the SOFC-GT.
65 citations
01 Jan 2003
TL;DR: The Large Eddy Simulation (LES) approach is used to simulate the combustor because of its demonstrated superiority over RANS in predicting turbulent mixing, which is central to combustion as mentioned in this paper.
Abstract: As part of the Accelerated Strategic Computing Initiative (ASCI) program, an accurate and robust simulation tool is being developed to perform high-fidelity LES studies of multiphase, multiscale turbulent reacting flows in aircraft gas turbine combustor configurations using hybrid unstructured grids. In the combustor, pressurized gas from the upstream compressor is reacted with atomized liquid fuel to produce the combustion products that drive the downstream turbine. The Large Eddy Simulation (LES) approach is used to simulate the combustor because of its demonstrated superiority over RANS in predicting turbulent mixing, which is central to combustion. This paper summarizes the accomplishments of the combustor group over the past year, concentrating mainly on the two major milestones achieved this year: 1) Large scale simulation: A major rewrite and redesign of the flagship unstructured LES code has allowed the group to perform large eddy simulations of the complete combustor geometry (all 18 injectors) with over 100 million control volumes; 2) Multi-physics simulation in complex geometry: The first multi-physics simulations including fuel spray breakup, coalescence, evaporation, and combustion are now being performed in a single periodic sector (1/18th) of an actual Pratt & Whitney combustor geometry.
65 citations