An electric propulsion long term test facility

1979 ◽  
Author(s):  
G. TRUMP ◽  
E. JAMES ◽  
R. VETRONE ◽  
R. BECHTEL
Keyword(s):  
Electric Propulsion ◽  
Test Facility

scholarly journals STG-ET: DLR electric propulsion test facility

2017 ◽  
Vol 3 ◽  
Author(s):  
Andreas Neumann
Keyword(s):  
Electric Propulsion ◽  
Vacuum Chamber ◽  
High Vacuum ◽  
Test Facility ◽  
Space Propulsion ◽  
Beam Dump ◽  
Pumping System ◽  
Thrust Measurement ◽  
Electric Space

DLR operates the High Vacuum Plume Test Facility Göttingen – Electric Thrusters (STG-ET). This electric propulsion test facility has now accumulated several years of EP-thruster testing experience. Special features tailored to electric space propulsion testing like a large vacuum chamber mounted on a low vibration foundation, a beam dump target with low sputtering, and a performant pumping system characterize this facility. The vacuum chamber is 12.2m long and has a diameter of 5m. With respect to accurate thruster testing, the design focus is on accurate thrust measurement, plume diagnostics, and plume interaction with spacecraft components. Electric propulsion thrusters have to run for thousands of hours, and with this the facility is prepared for long-term experiments. This paper gives an overview of the facility, and shows some details of the vacuum chamber, pumping system, diagnostics, and experiences with these components.

scholarly journals STG-ET: DLR Electric Propulsion Test Facility

2018 ◽  
Vol 4 ◽  
pp. 134 ◽  
Author(s):  
Andreas Neumann
Keyword(s):  
Electric Propulsion ◽  
Vacuum Chamber ◽  
High Vacuum ◽  
Test Facility ◽  
Space Propulsion ◽  
Beam Dump ◽  
Pumping System ◽  
Thrust Measurement ◽  
Electric Space

Abstract: DLR operates the High Vacuum Plume Test Facility Göttingen – Electric Thrusters (STG-ET). This electric propulsion test facility has now accumulated several years of EP-thruster testing experience. Special features tailored to electric space propulsion testing like a large vacuum chamber mounted on a low vibration foundation, a beam dump target made of low sputtering material, and a performant pumping system characterize this facility. The vacuum chamber is 12.2m long and has a diameter of 5m. With respect to accurate thruster testing, the design focus is on accurate thrust measurement, plume diagnostics, and plume interaction with spacecraft components. Electric propulsion thrusters have to run for thousands of hours, and with this the facility is prepared for long-term experiments. This paper gives an overview of the facility, and shows some details of the vacuum chamber, pumping system, diagnostics, and experiences with these components.

Long-Term Electric-Propulsion Geostationary Station-Keeping via Integer Programming

2019 ◽  
Vol 42 (5) ◽  
pp. 976-991 ◽  
Author(s):  
Clément Gazzino ◽  
Denis Arzelier ◽  
Christophe Louembet ◽  
Luca Cerri ◽  
Christelle Pittet ◽  
...  
Keyword(s):  
Integer Programming ◽  
Electric Propulsion ◽  
Station Keeping

Three-dimensional particle simulation of back-sputtered carbon in electric propulsion test facility

2017 ◽  
Vol 132 ◽  
pp. 161-169 ◽  
Author(s):  
Hongru Zheng ◽  
Guobiao Cai ◽  
Lihui Liu ◽  
Shengfei Shang ◽  
Bijiao He
Keyword(s):  
Electric Propulsion ◽  
Three Dimensional ◽  
Particle Simulation ◽  
Test Facility

scholarly journals Simulation of MASPn Experiments in MISTRA Test Facility with COCOSYS Code

2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
Mantas Povilaitis ◽  
Egidijus Urbonavičius
Keyword(s):  
Boundary Conditions ◽  
Nuclear Power ◽  
Power Plants ◽  
Volume Fraction ◽  
Characteristic Length ◽  
Initial Conditions ◽  
Test Facility ◽  
Work Package ◽  
Acceptable Agreement

An issue of the stratified atmospheres in the containments of nuclear power plants is still unresolved; different experiments are performed in the test facilities like TOSQAN and MISTRA. MASPn experiments belong to the spray benchmark, initiated in the containment atmosphere mixing work package of the SARNET network. The benchmark consisted of MASP0, MASP1 and MASP2 experiments. Only the measured depressurisation rates during MASPn were available for the comparison with calculations. When the analysis was performed, the boundary conditions were not clearly defined therefore most of the attention was concentrated on MASP0 simulation in order to develop the nodalisation scheme and define the initial and boundary conditions. After achieving acceptable agreement with measured depressurisation rate, simulations of MASP1 and MASP2 experiments were performed to check the influence of sprays. The paper presents developed nodalisation scheme of MISTRA for the COCOSYS code and the results of analyses. In the performed analyses, several parameters were considered: initial conditions, loss coefficient of the junctions, initial gradients of temperature and steam volume fraction, and characteristic length of structures. Parametric analysis shows that in the simulation the heat losses through the external walls behind the lower condenser installed in the MISTRA facility determine the long-term depressurisation rate.

scholarly journals Experimental and Numerical Examination of Naturally-Aged Foam-VIP Composites

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2539 ◽  
Author(s):  
Kaushik Biswas ◽  
Rohit Jogineedi ◽  
Andre Desjarlais
Keyword(s):  
Performance Monitoring ◽  
Numerical Models ◽  
Test Facility ◽  
Exposure Test ◽  
Rigid Foam ◽  
Study Results ◽  
Long Term Performance ◽  
Term Performance ◽  
Thermal Conductivities

This article describes an aging study of a foam-vacuum insulation panel (VIP) composite insulation board installed on a test wall in a natural exposure test facility through a 30-month period. Silica-based VIPs with a polymeric barrier film were used in this study. The study results showed the effectiveness of a VIP-based insulation to reduce the heat gains and losses through a wall compared to regular rigid foam insulation of the same thickness. However, the long-term performance monitoring indicated a gradual decline in the thermal performance of the foam-VIP composite. In addition, one-dimensional numerical models were created to simulate the in situ behavior of the foam-VIP composite. One model utilized constant thermal conductivities of the test wall components and another utilized temperature-dependent thermal conductivities; the latter used measurements of conductivity over temperatures ranging from −15 to 55 °C. The results of the simulations emphasized the need to use both temperature and time-dependent material properties for accurately predicting the long-term performance of VIP-based insulation systems.

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