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타이틀	Thermal Vacuum Integrated System Test at B-2
저자	Kudlac, Maureen T.;; Weaver, Harold F.;; Cmar, Mark D.
Keyword	CHEMICAL PROPULSION;; CRYOGENIC FLUIDS;; ELECTRIC PROPULSION;; HEAT SINKS;; LIQUID HYDROGEN;; LIQUID NITROGEN;; LIQUID OXYGEN;; NASA PROGRAMS;; PROPULSION;; RESEARCH FACILITIES;; SYSTEMS INTEGRATION;; THERMAL SIMULATION;; THERMAL VACUUM TESTS;; VACUUM CHAMBERS
URL	http://hdl.handle.net/2060/20130001753
보고서번호	NASA/TM-2012-217233
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The National Aeronautics and Space Administration (NASA) Glenn Research Center (GRC) Plum Brook Station (PBS) Space Propulsion Research Facility, commonly referred to as B-2, is NASA s third largest thermal vacuum facility. It is the largest designed to store and transfer large quantities of liquid hydrogen and liquid oxygen, and is perfectly suited to support developmental testing of chemical propulsion systems as well as fully integrated stages. The facility is also capable of providing thermal-vacuum simulation services to support testing of large lightweight structures, Cryogenic Fluid Management (CFM) systems, electric propulsion test programs, and other In-Space propulsion programs. A recently completed integrated system test demonstrated the refurbished thermal vacuum capabilities of the facility. The test used the modernized data acquisition and control system to monitor the facility during pump down of the vacuum chamber, operation of the liquid nitrogen heat sink (or cold wall) and the infrared lamp array. A vacuum level of 1.3x10(exp -4)Pa Ƒx10(exp -6)torr) was achieved. The heat sink provided a uniform temperature environment of approximately 77 K 鳌deg R) along the entire inner surface of the vacuum chamber. The recently rebuilt and modernized infrared lamp array produced a nominal heat flux of 1.4 kW/sq m at a chamber diameter of 6.7 m ྶ ft) and along 11 m ࿄ ft) of the chamber s cylindrical vertical interior. With the lamp array and heat sink operating simultaneously, the thermal systems produced a heat flux pattern simulating radiation to space on one surface and solar exposure on the other surface. The data acquired matched pretest predictions and demonstrated system functionality.