Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Kyun Ho Lee"'
Publikováno v:
Aerospace, Vol 11, Iss 9, p 716 (2024)
In this study, we investigate and propose an improved theoretical method to more accurately predict the performance of a field-emission electric propulsion (FEEP) thruster with its complex configuration. We identify critical flaws in the previous the
Externí odkaz:
https://doaj.org/article/7befd477bba64b48b30bc86abc8145e0
Publikováno v:
Case Studies in Thermal Engineering, Vol 45, Iss , Pp 102891- (2023)
The present research investigates a case study on thermal design and improvement of hydrazine monopropellant pipelines based on actual cases, in order to highlight the critical factors for thermal design when developing an onboard propulsion system f
Externí odkaz:
https://doaj.org/article/709eca05cc13450096748dfaec9320ff
Publikováno v:
Applied Sciences, Vol 13, Iss 23, p 12803 (2023)
This study examines the use of meta-heuristic algorithms, specifically particle swarm optimization and genetic algorithms, for optimizing thermal systems, addressing a research gap on their efficacy in larger systems. Utilizing MATLAB’s Simulink an
Externí odkaz:
https://doaj.org/article/939f54af9ee642d584f0bb8dde8c6a6a
Publikováno v:
Case Studies in Thermal Engineering, Vol 41, Iss , Pp 102679- (2023)
A droplet impingement on solid surfaces plays a critical role in various spray and heat transfer applications. The main objective of this study is to investigate how to enhance the cooling performance of the single droplet impingement process on the
Externí odkaz:
https://doaj.org/article/9b2784fe20064c508a9c402c8eb511bc
Publikováno v:
Case Studies in Thermal Engineering, Vol 31, Iss , Pp 101803- (2022)
Flat heat pipe, vapor chamber, thermal ground plane, and heat spreader have been emerging topics for various thermal applications such as electric battery packs and high-power computer chips. In this study, computational fluid dynamics is used to mod
Externí odkaz:
https://doaj.org/article/ec8241a3e25b45a4b991b14ee6641319
Publikováno v:
Mathematics, Vol 10, Iss 14, p 2527 (2022)
Heat exchangers are usually designed using a sophisticated process of trial-and-error to find proper values of unknown parameters which satisfy given requirements. Recently, the design of heat exchangers using evolutionary optimization algorithms has
Externí odkaz:
https://doaj.org/article/7c538f65d867499d8069e286f72e4375
Autor:
Kyun Ho Lee
Publikováno v:
PLoS ONE, Vol 13, Iss 9, p e0199667 (2018)
An exhaust plume gas flow from a bipropellant thruster has been recognized as a potential source of a load, heat, and contamination on the exposed satellite components which can especially degrade the optical properties and performance of solar panel
Externí odkaz:
https://doaj.org/article/2641d77cba9744a483a049de0ccc1506
Autor:
Kyun Ho Lee
Publikováno v:
PLoS ONE, Vol 12, Iss 6, p e0179351 (2017)
A space propulsion system is important for the normal mission operations of a spacecraft by adjusting its attitude and maneuver. Generally, a mono- and a bipropellant thruster have been mainly used for low thrust liquid rocket engines. But as the plu
Externí odkaz:
https://doaj.org/article/6c376d0a1aba454ca76213b6abec5fca
Publikováno v:
International Journal of Antennas and Propagation, Vol 2017 (2017)
This study improves the performance of a spaceborne synthetic aperture radar (SAR) system using an antenna mask design method and antenna pattern synthesis algorithms for an active phased array SAR system. The SAR antenna is an important component th
Externí odkaz:
https://doaj.org/article/934e45f7f0dc43d9a40f1c02fae9fc60
Autor:
Kyun Ho Lee
Publikováno v:
PLoS ONE, Vol 12, Iss 5, p e0176423 (2017)
In general, a space propulsion system has a crucial role in the normal mission operations of a spacecraft. Depending on the types and number of propellants, a monopropellant and a bipropellant thrusters are mostly utilized for low thrust liquid rocke
Externí odkaz:
https://doaj.org/article/fdd0c587c80d45e8bef2711ef3227f8a