Integration of supercomputers with aerospace ground test facilities

Thermal protection materials are required to preserve the metal components of motor that suffer severe heat load. The research on thermal response of insulation of ramjet combustion chamber was carried out by the ground test and numerical simulation. During the working time of the ramjet, the back-face temperature of the thermal protection material was measured. The scanning electron microscope of samples was investigated. The calculation of thermo-chemical flow was solved by the CFD software FLUENT to provide the heat load boundary for simulation of heat transfer of EPDM insulation. The heat transfer model was solved by the FEA software ANSYS. Comparison of the temperature profile at the ablating surface between calculation and measurement shows the two results agree with each other. The simulation results can provide the temperature rising trend of insulation in a certain extent.

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Natural durability and improved resistance of 20 Amazonian wood species after 30 years in ground contact

Holzforschung ◽

10.1515/hf-2020-0192 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Fernando Nunes Gouveia ◽

Marcelo Fontana da Silveira ◽

Alencar Garlet

Keyword(s):

Wood Species ◽

Climatic Conditions ◽

Natural Durability ◽

Amazon Forest ◽

Ground Contact ◽

Forest Environment ◽

Ground Test ◽

The Tropics ◽

Dipteryx Odorata ◽

Copper Arsenate

Abstract This study aimed to assess the natural durability of 20 Amazonian wood species preserved with chromated copper arsenate (CCA) after 30 years in ground contact in an experimental field test at National Forest of Tapajós, Pará state - Brazil. Heartwood samples with a cross-section of 5 × 5 cm and 50 cm of length were half-buried in soil and inspected every year for decay. The species were classified according to natural durability following the classification method proposed by Findlay (Findlay, W.P.K. (1985). The nature and durability of wood. In: Findlay, W.P.K. (Ed.), Preservation of timber in the tropics. Springer Science, Whitchurch, pp. 1–13). After 30 years in ground test, six species were classified as Perishable, seven as Non-durable, three as Durable and four as Very durable, namely: Trichilia lecointei, Lecythis pisonis, Pseudopiptadenia suaveolens, and Dipteryx odorata (Very durable), Protium tenuifolium, Dinizia excelsa, and Ormosia paraensis (Durable), Endopleura uchi, Goupia glabra, Pouteria egregia, Tachigali chrysophylla, Tachigali paraensis, Vatairea sericea, and Vochysia maxima (Non-durable) and Chrysophyllum lucentifolium, Couratari oblongifolia, Didymopanax morototoni, Lueheopsis duckeana, Sterculia excelsa, and Xylopia nitida (Perishable). CCA preservative treatment was effective to promote timber protection, even under harsh climatic conditions of the Amazon forest environment.

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Charging of Composites in Space Environment: Ground Test Data

IEEE Transactions on Nuclear Science ◽

10.1109/tns.2007.908655 ◽

2007 ◽

Vol 54 (6) ◽

pp. 1981-1984 ◽

Cited By ~ 6

Author(s):

Alexander L. Bogorad ◽

Justin J. Likar ◽

Roman Herschitz

Keyword(s):

Test Data ◽

Space Environment ◽

Ground Test

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A Flight Simulation Vision for Aeropropulsion Altitude Ground Test Facilities

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1806452 ◽

2005 ◽

Vol 127 (1) ◽

pp. 8-17 ◽

Cited By ~ 3

Author(s):

Milt Davis ◽

Peter Montgomery

Keyword(s):

System Performance ◽

Engine Performance ◽

Aircraft Engine ◽

Flight Simulation ◽

Propulsion System ◽

Test Facility ◽

Flight Testing ◽

Test Environment ◽

Ground Test ◽

Aircraft System

Testing of a gas turbine engine for aircraft propulsion applications may be conducted in the actual aircraft or in a ground-test environment. Ground test facilities simulate flight conditions by providing airflow at pressures and temperatures experienced during flight. Flight-testing of the full aircraft system provides the best means of obtaining the exact environment that the propulsion system must operate in but must deal with limitations in the amount and type of instrumentation that can be put on-board the aircraft. Due to this limitation, engine performance may not be fully characterized. On the other hand, ground-test simulation provides the ability to enhance the instrumentation set such that engine performance can be fully quantified. However, the current ground-test methodology only simulates the flight environment thus placing limitations on obtaining system performance in the real environment. Generally, a combination of ground and flight tests is necessary to quantify the propulsion system performance over the entire envelop of aircraft operation. To alleviate some of the dependence on flight-testing to obtain engine performance during maneuvers or transients that are not currently done during ground testing, a planned enhancement to ground-test facilities was investigated and reported in this paper that will allow certain categories of flight maneuvers to be conducted. Ground-test facility performance is simulated via a numerical model that duplicates the current facility capabilities and with proper modifications represents planned improvements that allow certain aircraft maneuvers. The vision presented in this paper includes using an aircraft simulator that uses pilot inputs to maneuver the aircraft engine. The aircraft simulator then drives the facility to provide the correct engine environmental conditions represented by the flight maneuver.

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