A novel quasi-one-dimensional model for performance estimation of a Vaporizing Liquid Microthruster

Giorgi, Maria Grazia De; Fontanarosa, Donato

doi:10.1016/j.ast.2018.11.039

Cited by 20 publications

(4 citation statements)

References 34 publications

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“…The static temperature at the inlet and at walls was set to 300 K for gas nitrogen, while water vapor inlet and wall temperatures were set to 505.58 K, as retrieved by solving the steadystate boiling flow inside the heating chamber using an in-house 1D model [6]. The downstream pressure was set to 500 Pa in NS simulations, and 0.001 Pa for DSMC computations under low-pressure operating condition.…”

Section: Numerical Approachmentioning

confidence: 99%

“…The final mesh size is cells. The validation and verification of mesh and numerical modelling has been previously performed as described in [6] based on experimental data by Cen [10].…”

Section: Navier-stokes Modelingmentioning

confidence: 99%

“…By considering the global performance of micro-resistojets, the micronozzle overall efficiency is strongly affected by the entity of the viscous effects [5,6]. These last ones are influenced by the degree of gas rarefaction, since it determines the mechanisms of interaction between gas-gas molecules and solid wall-gas molecules.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of numerical predictions of the supersonic expansion inside micronozzles of micro–resistojets

2019

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The present work provides a numerical investigation of the supersonic flow inside a planar micronozzle configuration under different gas rarefaction conditions. Two different propellants have been considered, namely water vapor and nitrogen, which relate to their use in VLMs (the former) and cold gas microthrusters (the latter), respectively. Furthermore, two different numerical approaches have been used due to the different gas rarefaction regime, i.e. the typical continuum Navier–Stokes with partial slip assumption at walls and the particle–based Direct Simulation Monte Carlo (DSMC) technique. As a result, under high–pressure operating conditions, both water and nitrogen flows supersonically expanded into the micronozzle without chocking in combination with a linear growth of the boundary layer on walls. However, when low–pressure operating condition are imposed and a molecular regime is established inside the micronozzle, a very rapid expansion occurred close to the nozzle exit in combination with a strong chocking of the flow and a micronozzle quality reduction of about 40%. Furthermore, water exhibited specific higher specific impulse than nitrogen above 60%.

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Section: Numerical Approachmentioning

confidence: 99%

“…The final mesh size is cells. The validation and verification of mesh and numerical modelling has been previously performed as described in [6] based on experimental data by Cen [10].…”

Section: Navier-stokes Modelingmentioning

confidence: 99%

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Comparison of numerical predictions of the supersonic expansion inside micronozzles of micro–resistojets

2019

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“…The loose coupling method based on the quasi-steady flow field considers that in the whole process of fluid-solid coupling heat transfer, the flow field is in several quasi-steady states, and each quasi-steady flow field is solved by the steady-state Navier-Stokes equations; the research results show that the algorithm can greatly improve the calculation efficiency, but the deviation of the calculation results is large, which is mainly due to the large deviation between the treatment method of completely isolating the flow field from other parts and the actual coupling relationship [22][23][24]. De Giorgi and Fontanarosa [25] proposed a novel quasi-onedimensional model for the performance estimation of a vaporizing liquid microthruster (VLM); in their study, the performance of 1D model well agreed with the experimental data, with a maximum estimated error of 7.3% on the thrust and the specific impulse.…”

Section: Introductionmentioning

confidence: 99%

Study on Heat Exchange Structure Design and Propulsion Performance of Solar Thermal Thruster

Zhang

Huang

2022

International Journal of Aerospace Engineering

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This paper designed a platelet heat exchanger in the solar thermal thruster and analyzed the unsteady-state conjugate heat transfer characteristics between heat exchanger and propellant. The conjugate heat transfer (CHT) computational fluid dynamics (CFD) simulation of the 3D model of the platelet under steady-state conditions was carried out with different mass flow rates to find the empirical correlation between the average Nusselt number and the average Reynolds number. The unsteady-state 1D simplified model of the heat exchanger was established using a loose coupling algorithm based on quasi-steady flow domain and finally verified by experiments. The results show that the platelet structure could heat the working medium to more than 2380 K with the heat transfer efficiency of 87% and produce a peak thrust of 0.57 N and specific impulse of 2200 m/s; in steady state, the outlet temperature and heat transfer efficiency of the heat exchanger were stable at 1950 K and 69%. Moreover, 1D model could accurately reflect the real heat exchange situation to a certain extent, the simulation error was less than 5% compared with the 3D model, and the calculation time was greatly shortened, making it more convenient to adjust the heat exchange strategy. The experimental results were consistent with the simulation results at the initial stage of heat exchange, and the difference was mainly reflected in the steady-state stage, which might be caused by the lack of precision of the experimental equipment.

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A tubular vaporizing liquid micro-thruster with induction heating

Liu

Wang

et al. 2020

Heat Mass Transfer

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A novel quasi-one-dimensional model for performance estimation of a Vaporizing Liquid Microthruster

Cited by 20 publications

References 34 publications

Comparison of numerical predictions of the supersonic expansion inside micronozzles of micro–resistojets

Comparison of numerical predictions of the supersonic expansion inside micronozzles of micro–resistojets

Study on Heat Exchange Structure Design and Propulsion Performance of Solar Thermal Thruster

A tubular vaporizing liquid micro-thruster with induction heating

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