Results 1 to 10 of about 25,392 (120)
Effects of the Wall Temperature on Rarefied Gas Flows and Heat Transfer in a Micro-Nozzle [PDF]
Micromachines, 2023 When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster.
Shurui Zhang +5 more
doaj +2 more sources
Direct Simulation Monte Carlo Simulation of the Effect of Needle Valve Structures on the Rarefied Flow of Cold Gas Thrusters [PDF]
Micromachines, 2023 The needle valve, serving as the flow control unit of the thruster system, is a crucial component of the entire thruster. Its performance directly impacts the flow state of the rarefied gas in the micro-nozzle structure of the cold gas micro-thruster ...
Songcai Lu +5 more
doaj +2 more sources
Aerospace, 2023 The cold gas micro-propulsion system can provide low noise and ultra-high accuracy thrust for satellite platforms for space gravitational wave detection, high-precision earth gravity field measurement.
Xudong Wang +4 more
doaj +1 more source
Energies, 2023 In this study, we first considered the influence of micro-nozzle wall roughness structure on molecular collision and reflection behavior and established a modified CLL model.
Xuhui Liu +4 more
doaj +1 more source
Thrust Augmentation of Micro-Resistojets by Steady Micro-Jet Blowing into Planar Micro-Nozzle
Applied Sciences, 2021 The present work investigates the impact of steady micro-jet blowing on the performance of a planar micro-nozzle designed for both liquid micro-thrusters and nitrogen cold-gas micro-resistojets.
Donato Fontanarosa +2 more
doaj +1 more source
A Directional Microplasma Thruster Exhibiting a Switchable Intense Plasma Coupling
IEEE Access, 2020 Conventional cold and warm gas thrusters with low specific impulses and thrust greatly limit the capability of nanosatellites to conduct meaningful plane and attitude changes in space.
Sung-O Kim +2 more
doaj +1 more source
A continuous source of translationally cold dipolar molecules [PDF]
, 2002 The Stark interaction of polar molecules with an inhomogeneous electric field is exploited to select slow molecules from a room-temperature reservoir and guide them into an ultrahigh vacuum chamber. A linear electrostatic quadrupole with a curved section
A.N. Nikolov +22 more
core +3 more sources
Micro heat exchanger by using MEMS impinging jets [PDF]
, 1999 A micro impinging-jet heat exchanger is presented here. Heat transfer is studied for single jet, slot arrays and jet arrays. In order to facilitate micro heat transfer measurements with these devices, a MEMS sensor chip, which has an 8 x 8 temperature ...
Ho, C. M., Mai, J., Tai, Y. C., Wu, S.
core +1 more source
DESIGN AND FABRICATION OF MICRONOZZLES
International Islamic University Malaysia Engineering Journal, 2011 Micronozzle, a key component in micropropulsion system, has been designed and fabricated. Quasi 1D inviscid theory was used in designing a series of conical micronozzles of different expander half-angles (10°-50°).
Kean How Cheah, Jit Kai Chin
doaj +1 more source
, 2023 Micro spacecraft have garnered increasing favor for their adaptability in space missions. Cold gas propellant-based (CGP) micro propulsion systems assume a pivotal role in enabling maneuvering, monitoring, and precise attitude control in micro/nanosatellites, offering attributes of simplicity, non-toxicity, and minimal leakage compared to alternative ...
openaire +2 more sources