Recent active thermal management technologies for the development of energy-optimized aerospace vehicles in China

Wang, Ji‐Xiang; Li, Yunze; Liu, Xiangdong; Shen, Chaoqun; Zhang, Hongsheng; Xiong, Kai

doi:10.1016/j.cja.2020.06.021

Cited by 96 publications

(22 citation statements)

References 104 publications

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“…1 , human sneeze is a complicated process as it includes highly unsteady and coupled processes. Such phenomenon contains both continuous and discrete phases, the Eulerian-Lagrangian approach is adopted to describe this multiphase flow ( Wang et al., 2020a , Wang et al., 2020b ). The surrounding air medium flowing pattern which is primarily influenced by the AD is modelled by Eulerian method, and the movement of discrete ejected virus particles is tracked by the Lagrangian formulation.…”

Section: Mathematical Formulationmentioning

confidence: 99%

An air distribution optimization of hospital wards for minimizing cross-infection

Wang

Cao

Chen

2021

Journal of Cleaner Production

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Currently, the “2019-CoV-2” has been raging across the world for months, causing massive death, huge panic, chaos, and immeasurable economic loss. Such emerging epidemic viruses come again and again over years, leading to similar destructive consequences. Air-borne transmission among humans is the main reason for the rapid spreading of the virus. Blocking the air-borne transmission should be a significant measure to suppress the spreading of the pandemic. Considering the hospital is the most probable place to occur massive cross-infection among patients as emerging virus usually comes in a disguised way, an air distribution optimization of a general three-bed hospital ward in China is carried out in this paper. Using the Eulerian-Lagrangian method, sneeze process from patients who are assumed to be the virus carrier, which is responsible for a common event to trigger cross-infection, is simulated. The trajectory of the released toxic particle and the probability of approaching others in the same ward are calculated. Two evaluation parameter, total maximum time (TMT) and overall particle concentration (OPC) to reflect the particle mobility and probability to cause cross-infection respectively, are developed to evaluate the proposed ten air distributions in this paper. A relatively optimized air distribution proposal with the lowest TMT and OPC is distinguished through a three-stage analysis. Results show that a bottom-in and top-out air distribution proposal is recommended to minimize cross-infections.

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Section: Mathematical Formulationmentioning

confidence: 99%

An air distribution optimization of hospital wards for minimizing cross-infection

Wang

Cao

Chen

2021

Journal of Cleaner Production

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“…On the one hand, the aircraft is equipped with a large amount of electromechanical equipment, covering energy conversion, transmission, utilization, etc. During the process, the energy losses are converted into heat loads, which substantially increases the heat-dissipation requirements [5,6]. On the other hand, aircrafts mainly use ram air and fuel as heat sinks [7,8], but technical measures such as the extensive use of composite materials in the aircraft structure, the restriction of the ram-air inlet for stealth and the removal of large energy-consuming bleed air further reduce the available heat sink [9], causing a huge gap in the thermal management of the whole aircraft.…”

Section: Introductionmentioning

confidence: 99%

Parameter-Matching Algorithm and Optimization of Integrated Thermal Management System of Aircraft

Dong

Jiang

et al. 2022

Aerospace

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The integrated thermal management system of aircraft is essential to maintain a suitable environment for the cabin crew and devices. The system is composed of the air-cycle refrigeration subsystem, the vapor-compression refrigeration subsystem, the liquid-cooling subsystem and the fuel-cycle subsystem, which are coupled with each other through heat exchangers. Due to the complex structure and large number of components in the system, it is necessary to design a corresponding parameter-matching algorithm for its special structure and to select the appropriate optimization design method. In this paper, the structure of an integrated thermal management system is analyzed in depth. A hierarchical matching algorithm of system parameters was designed and realized. Meanwhile, a sensitivity analysis of the system was performed, where key parameters were selected. Besides, a variety of optimization algorithms was used to optimize the design calculations. The results show that the particle swarm optimization and genetic algorithm could effectively find the global optimal solution when taking the fuel penalty as the objective function. Furthermore, the particle swarm optimization method took less time.

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“…e stiffness and strength problems caused by thermal stress are indescribably important in some engineering structures which has been an important factor for the design of engineering devices in the field of aerospace, mechanical, civil, electronic engineering, and some microstructures [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

2D Quasi-Static Accurate Solutions for Isotropic Thermoelastic Materials with Applications

Xiao

Tong

Liu

et al. 2021

Mathematical Problems in Engineering

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Thermally induced stress is an important scientific problem in engineering applications. In this paper, an accurate and efficient method for the two-dimensional quasi-static thermal elastic problem is established to explore the thermal stress problem. First, the compact quasi-static two-dimensional general solution is derived in terms of simple potential functions. The general solution is simple in form and can be derived for arbitrary boundary problems subjected to a line heat load. This is completely new to the literature. Second, Green’s function solutions of an infinite plane under the line pulse heat source based on the general solutions are presented to analyze the thermal stress field. Lastly, numerical results are taken into account to study the temperature and stress field induced by the dynamic heat source load. The corresponding analysis can constitute to reveal the mechanism of thermal elastic problems and provide some guidance for experiments or engineering structural design in the future work.

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Recent active thermal management technologies for the development of energy-optimized aerospace vehicles in China

Cited by 96 publications

References 104 publications

An air distribution optimization of hospital wards for minimizing cross-infection

An air distribution optimization of hospital wards for minimizing cross-infection

Parameter-Matching Algorithm and Optimization of Integrated Thermal Management System of Aircraft

2D Quasi-Static Accurate Solutions for Isotropic Thermoelastic Materials with Applications

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