+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Vanfossen, G. James  NASA Center > Glenn Research Center  Publication Year > 1991-2000 > 1992  Subject > D-F > Fluid Mechanics And Heat Transfer  Availability Options > Online > PDF  Item/Media Type > Conference Paper  Item/Media Type > NASA Report > Technical Memorandum (TM)  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Modelling and experimental verification of a water alleviation system for the NASP Author(s): Vanfossen, G. James Abstract: One possible low speed propulsion system for the National Aerospace Plane is a liquid air cycle engine (LACE). The LACE system uses the heat sink in the liquid hydrogen propellant to liquefy air in a heat exchanger which is then pumped up to high pressure and used as the oxidizer in a hydrogen liquid air rocket. The inlet airstream must be dehumidified or moisture could freeze on the cryogenic heat exchangers and block them. The main objective of this research has been to develop a computer simulation of the cold tube/antifreeze-spray water alleviation system and to verify the model with experimental data. An experimental facility has been built and humid air tests were conducted on a generic heat exchanger to obtain condensing data for code development. The paper describes the experimental setup, outlines the method of calculation used in the code, and presents comparisons of the calculations and measurements. Cause of discrepancies between the model and data are explained. NASA Center: Glenn Research Center Publication Date: JAN 1, 1992 Document Source: CASI Online Source: View PDF File Document ID: 19920013981 Accession ID: 92N23224 Publication Information: Number of Pages = 13 Report Number: E-7026; NAS 1.15:105661; NASA-TM-105661 Contract-Grant-Task Number: RTOP 763-22-00 Price Code: A03 Meeting Information: National Heat Transfer Conference, 92nd, 9-12 Aug. 1992, San Diego, CA, United States Keywords: CONDENSING; HEAT EXCHANGERS; HEAT TRANSFER; MASS TRANSFER; NATIONAL AEROSPACE PLANE PROGRAM; PROPULSION SYSTEM CONFIGURATIONS; TESTS; WATER; COMPUTERIZED SIMULATION; CRYOGENICS; ETHYLENE COMPOUNDS; HEAT SINKS; LIQUID AIR; LIQUID AIR CYCLE ENGINES; REFRIGERATING MACHINERY; Notes: Proposed for presentation at the 92nd National Heat Transfer Conference, San Diego, CA, 9-12 Aug. 1992; sponsored by ASME Accessibility: Unclassified; No Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2005-08-25 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007