Aspects of Complexity of Metal-Fibrous Microstructure for the Construction of High-Performance Heat Exchangers: Thermal Properties

Orman, Łukasz J.

doi:10.3846/aviation.2020.12086

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…The results of practical use of mesh channels are known in the development of lattice wings [3,4], heat exchangers [5][6][7], and ejectors for various purposes [8,9]. The maximum rigidity of the rotor structure is achieved with a minimum rotor mass using modern additive technologies [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Prototyping and Study of Mesh Turbomachinery Based on the Euler Turbine

et al. 2021

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This paper presents a scientific development aimed at improving the efficiency of turbomachines through the joint use of rotary-vane and vortex workflows. In the well-known Euler turbine, the rotor flow channels represent a set of curved pipes. The authors propose to consider in more detail the possibilities of using such rotating pipes in the implementation of an ejection (vortex) workflow. A hybrid pump was considered with the conclusion that its workflow can be described using two Euler equations. The results of computer simulation indicate that hybrid turbomachines are promising. The use of additive technology allowed the creation of micromodels of the Euler turbine with various rotor designs. Laboratory hydraulic tests showed that the liquid inlet to the rotor is possible in pulse mode. Laboratory tests of micromodels using compressed air showed that gas (or liquid) motion through curved pipes could be carried out from the rotor periphery to its center and then back, albeit through another curved pipe. The research results demonstrated that the scientific and technical potential of the Euler turbine is not yet fully unlocked, and research in this direction should continue. The study results are applicable in various industries including the energyeconomy, robotics, aviation, and water transport industries.

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Section: Introductionmentioning

confidence: 99%

Prototyping and Study of Mesh Turbomachinery Based on the Euler Turbine

et al. 2021

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“…At the same time, note that modern computer simulations cannot completely replace a physical experiment [15,16]. The lattice structure of the channels significantly improves the heat dissipation characteristics of heat exchangers of various designs [17][18][19]. The mesh structure of the channels makes it possible to reduce the weight and overall dimensions of the heat exchanger [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

Sazonov

Mokhov²,

Gryaznova³

et al. 2022

Civ Eng J

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This research discusses developing an Euler turbine-based hybrid mesh turbomachinery. Within the framework of mechanical engineering science, turbomachinery classification and a novel method for mesh turbomachinery design were considered. In such a turbomachine, large blades are replaced by a set of smaller blades, which are interconnected to form flow channels in a mesh structure. Previous studies (and reasoning within the framework of inductive and deductive logic) showed that the jet mesh control system allows for operation with several flows simultaneously and provides a pulsed flow regime in flow channels. This provides new opportunities for expanding the control range and reducing the thermal load on the turbomachine blades. The novel method for performance evaluation was confirmed by the calculation: the possibility of implementing pulsed cooling of blades periodically washed by a hot working gas flow (at a temperature of 1000°C) and a cold gas flow (at a temperature of 20°C) was shown. The temperature of the blade walls remained 490–525°C. New results of ongoing research are focused on creating multi-mode turbomachinery that operates in complicated conditions, e.g., in offshore gas fields. Gas energy is lost and dissipated in the throttle at the mouth of each high-pressure well. Within the framework of ongoing research, the environmentally friendly net reservoir energy of high-pressure well gas should be rationally used for operating a booster compressor station. Here, the energy consumption from an external power source can be reduced by 50%, according to preliminary estimates. Doi: 10.28991/CEJ-2022-08-11-017 Full Text: PDF

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“…In a turbomachine, the larger blades are replaced by a set of smaller blades, which are interconnected to form flow channels in the form of a mesh structure. The results of studies of the mesh structure of flow channels in the development of lattice wings [2,3], heat exchangers [4][5][6], and ejectors of various purposes are known [7]. In general, any ejector includes the following main parts: nozzle, mixing chamber, and diffuser.…”

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confidence: 99%

Development and Prototyping of Jet Systems for Advanced Turbomachinery with Mesh Rotor

et al. 2021

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This article presents the research results that aim to develop promising mesh turbomachines equipped with jet control systems. The turbomachines operating in difficult conditions in oil and gas production are mainly considered. At the same time, some research results can be used in other production branches, including power engineering and transport. Three-dimensional models for computer simulation of net turbines and jet control systems were developed. Prototypes and micromodels were created to test the performance of mesh turbines and jet control systems using additive technologies. A methodological approach is proposed to create a classification of jet control systems considering their design and technological features. In the course of numerical experiments, the extreme conditions of fluid and gas outflow through a nozzle equipped with a velocity vector control system, in the control range of adjustment of the velocity vector deflection angle from + 90o to -90o within a geometric hemisphere, have been considered for the first time. It was also shown that when using a dual-channel nozzle, there are possibilities to adjust the velocity vector angle (thrust vector) in the range of + 180o to -180owithin the geometric sphere. Compared with the known variants, the control range of the velocity vector angle is increased by nine times. These calculated data are presented in addition to the previously published results of physical laboratory experiments. Preliminary results of numerical experiments show the possibility of creating a new theory in the field of mesh turbines and jet systems. Patents support the novelty of the developed technical solutions. Doi: 10.28991/esj-2021-01311 Full Text: PDF

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Aspects of Complexity of Metal-Fibrous Microstructure for the Construction of High-Performance Heat Exchangers: Thermal Properties

Cited by 4 publications

References 14 publications

Prototyping and Study of Mesh Turbomachinery Based on the Euler Turbine

Prototyping and Study of Mesh Turbomachinery Based on the Euler Turbine

Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

Development and Prototyping of Jet Systems for Advanced Turbomachinery with Mesh Rotor

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