Performance assessment of a closed-recuperative-Brayton-cycle based integrated system for power generation and engine cooling of hypersonic vehicle

Cheng, Kunlin; Qin, Jiang; Sun, Hongchuang; Dang, Chaolei; Liu, Xiaoyong; Bao, Wen

doi:10.1016/j.ast.2019.02.028

Cited by 40 publications

(8 citation statements)

References 30 publications

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“…There are many types of thermodynamic cycles which can be coupled to engines as the waste heat recovery system [25][26][27][28][29], and the most well-known one is the organic Rankine cycle (ORC) [21,27]. This cycle contains four components in which the organic working fluid circulates in a cycle [22].…”

Section: Introductionmentioning

confidence: 99%

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Energy and exergy analysis of a novel turbo-compounding system for supercharging and mild hybridization of a gasoline engine

Salek

Babaie

Ghodsi

et al. 2020

J Therm Anal Calorim

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Number of hybrid vehicles has increased around the world significantly. Automotive industry is utilizing the hybridization of the powertrain system to achieve better fuel economic and emissions reduction. One of the options recently considered in research for hybridization and downsizing of vehicles is to employ waste heat recovery systems. In this paper, the addition of a turbo-compound system with an air Brayton cycle (ABC) to a naturally aspirated engine was studied in AVL BOOST software. In addition, a supercharger was modeled to charge extra air into the engine and ABC. The engine was first validated against the experimental data prior to turbo-compounding. The energy and exergy analysis was performed to understand the effects of the proposed design at engine rated speed. Results showed that between 16 and 18% increase in engine mechanical power can be achieved by adding turbo-compressor. Furthermore, the recommended ABC system can recover up to 1.1 kW extra electrical power from the engine exhaust energy. The energy and exergy efficiencies were both improved slightly by turbo-compounding and BSFC reduced by nearly 1% with the proposed system. Furthermore, installing the proposed system resulted in increase in backpressure up to approximately 23.8 kPa.

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Section: Introductionmentioning

confidence: 99%

“…Air Brayton cycle (ABC) is another cycle also recommended for WHR in the literature [24,28,29] which may have some advantages over ORC for vehicle engine applications as it is less complex. The lower number of ABC components when compared to ORC means that ABC will add less mass to vehicle than ABC in implementations.…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis of a novel turbo-compounding system for supercharging and mild hybridization of a gasoline engine

Salek

Babaie

Ghodsi

et al. 2020

J Therm Anal Calorim

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“…It is a truth universally acknowledged-that an aviation vehicle in possession of a good flight performance, must be in want of a reliable propulsion system. Currently, considerable attention has been paid to the candidates of next generation aviation propulsion solution, such as variable cycle aeroengine [1], hypersonic precooled engine [2,3]. One noteworthy feature of these candidate solutions is the excellent multi-mission adaptability due to their special functions, such as variable geometry schedule, multi-cycle coupling mechanism [4], the regenerative cooling system [5], etc.…”

Section: Introductionmentioning

confidence: 99%

A Study on Aeroengine Conceptual Design Considering Multi-Mission Performance Reliability

Cao

Bai

2020

Applied Sciences

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Owing to the realization of multi-mission adaptability requires more complex mechanical structure, the candidates of future aviation propulsion are confronted with more overall reliability problems than that of the conventional gas turbine engine. This situation is challenging to a traditional aeroengine deterministic design method. To overcome this challenge, the Reliability-based Multi-Design Point Methodology is proposed for aeroengine conceptual design. The presented methodology adopted an unconventional approach of engaging the reliability prediction by artificial neural network (ANN) surrogate models rather than the time-consuming Monte Carlo (MC) simulation. Based on the Adaptive Particle swarm optimization, the utilization of the pre-training technique optimizes the initial network parameters to acquire better-conditioned initial network, which is sited closer to designated optimum so that contributes to the convergence property. Moreover, a new hybrid algorithm is presented to integrate the pre-training technique into neural network training procedure in order to enhance the ANN performance. The proposed methodology is applied to the cycle design of a turbofan engine with uncertainty component performance. The testing results certify that the prediction accuracy of pre-trained ANN is improved with negligible computational cost, which only spent nearly one-millionth as much time as the MC-based probabilistic analysis (0.1267 s vs. 95,262 s, for 20 testing samples). The MC simulation results substantiate that optimal cycle parameters precisely improve the engine overall performance to simultaneously reach expected reliability (≥98.9%) in multiple operating conditions without unnecessary performance redundancy, which verifies the efficiency of the presented methodology. The presented efforts provide a novel approach for aeroengine cycle design, and enrich reliability design theory as well.

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“…The Brayton cycle, because of its small size and mass and relatively easy integration into transport systems, is increasingly being used as a versatile tool to improve energy efficiency and eco-efficiency and to practically reduce the CO 2 emissions of internal combustion engines of all purposes [63][64][65][66][67].…”

mentioning

confidence: 99%

“…An integrated system based on the closed recuperative Brayton cycle (CRBC) for power generation and engine cooling was presented in Reference [64]. In CRBC applied to hypersonic vehicles-next-generation aircraft and spacecraft with broad applications-the combustion heat dissipation is transferred by liquid metal Na and partly converted into electric power.…”

mentioning

confidence: 99%

Use of LNG Cold Potential in the Cogeneration Cycle of Ship Power Plants

Wang

Lebedevas

Rapalis

et al. 2020

JMSE

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This paper presents the results of a numerical study on the parameters that affect the efficiency of the cogeneration cycle of a ship’s power plant. The efficiency was assessed based on the excess power (Ngen.) of a free turbine, operated with the inflow of gaseous nitrogen, which was used to generate electricity. A mathematical model and simulation of the regenerative cycle were created and adjusted to operate with a dual-fuel (diesel-liquid natural gas (LNG)) six-cylinder four-stroke engine, where the energy of the exhaust gas was converted into mechanical work of the regenerative cycle turbine. The most significant factors for Ngen. were identified by parametrical analysis of the cogeneration cycle: in the presence of an ‘external’ unlimited cold potential of the LNG, Ngen. determines an exhaust gas temperature Teg of power plant; the pressure of the turbo unit and nitrogen flow are directly proportional to Ngen. When selecting the technological units for cycle realization, it is rational to use high flow and average πT pressure (~3.0–3.5 units) turbo unit with a high adiabatic efficiency turbine. The effect of the selected heat exchangers with an efficiency of 0.9–1.0 on Ngen. did not exceed 10%. With LNG for ‘internal’ use in a ship as a fuel, the lowest possible temperature of N2 is necessary, because each 10 K increment in N2 entering the compressor decreases Ngen. by 5–8 kW, i.e., 5–6%.

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Performance assessment of a closed-recuperative-Brayton-cycle based integrated system for power generation and engine cooling of hypersonic vehicle

Cited by 40 publications

References 30 publications

Energy and exergy analysis of a novel turbo-compounding system for supercharging and mild hybridization of a gasoline engine

Energy and exergy analysis of a novel turbo-compounding system for supercharging and mild hybridization of a gasoline engine

A Study on Aeroengine Conceptual Design Considering Multi-Mission Performance Reliability

Use of LNG Cold Potential in the Cogeneration Cycle of Ship Power Plants

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