| 词条 | Langley Research Center |
| 释义 |
|agency_name =NASA Langley Research Center |nativename = |nativename_a = |nativename_r = |logo = NASA logo.svg |logo_width = 100px |seal = |seal_width = 140px |picture = file:NASA Langley Research Center aerial view (2011).jpg |picture_width = 300px |picture_caption = Aerial view of NASA Langley in 2011 |formed = 1917 |preceding1 = Langley Memorial Aeronautical Laboratory |jurisdiction = US Federal Government |headquarters = Hampton, Virginia, United States |employees = 1,821 (2017) |budget = |chief1_name = Dr. David E. Bowles |chief1_position = Director |chief2_name = Clayton P. Turner |chief2_position = Deputy Director |chief3_name = Cathy H. Mangum |chief3_position = Associate Director |parent_agency = NASA |website = {{url|http://www.nasa.gov/langley}} |footnotes = [1][1][2][4] |map = NASA Langley Research Center Map.jpg |map_width = 180px |map_caption = Map of NASA Langley Research Center }} Langley Research Center (LaRC or NASA Langley) located in Hampton, Virginia, United States, is the oldest of NASA's field centers.[3] It directly borders Langley Air Force Base and the Back River on the Chesapeake Bay. LaRC has focused primarily on aeronautical research, but has also tested space hardware at the facility, such as the Apollo Lunar Module. In addition, a number of the earliest high-profile space missions were planned and designed on-site. Established in 1917 by the National Advisory Committee for Aeronautics (NACA), the research center devotes two-thirds of its programs to aeronautics, and the rest to space. LaRC researchers use more than 40 wind tunnels to study and improve aircraft and spacecraft safety, performance, and efficiency. Between 1958 and 1963, when NASA (the successor agency to NACA) started Project Mercury, LaRC served as the main office of the Space Task Group. In June 2015, after previously serving as associate director, then deputy director, Dr. David E. Bowles was appointed director of NASA Langley.[4] HistoryAfter US-German relations had deteriorated from neutral to hostile around 1916, the prospect of U.S. war entry became possible. On February 15, 1917, the newly established Aviation Week warned that the U.S. military aviation capability was less than what was operating in the European war.[5] President Woodrow Wilson sent Jerome Hunsaker to Europe to investigate, and Hunsaker's report prompted Wilson to command the creation of the nation's first aeronautics laboratory, which became NASA Langley.[6] In 1917, less than three years after it was created, the NACA established Langley Memorial Aeronautical Laboratory on Langley Field. Both Langley Field and the Langley Laboratory are named for aviation pioneer Samuel Pierpont Langley.[7] The Aviation Section, U.S. Signal Corps had established a base there earlier that same year. The first research facilities were in place and aeronautical research was started by 1920. Initially the laboratory included four researchers and 11 technicians.[8] Langley Field and NACA began parallel growth as air power proved its utility during World War I. The center was originally established to explore the field of aerodynamic research involving airframe and propulsion engine design and performance. In 1934 the world's largest wind tunnel was constructed at Langley Field with a 30 × 60 foot test section; it was large enough to test full-scale aircraft.[9][10] It remained the world's largest wind tunnel until the 1940s, when a 40 × 80 foot tunnel was built at NASA Ames Research Center in California.[11] Early in 1945, the center expanded to include rocket research, leading to the establishment of a flight station at Wallops Island, Virginia. A further expansion of the research program permitted Langley Research Center to orbit payloads, starting with NASA's Explorer 9 balloon satellite in mid-February 1961. As rocket research grew, aeronautics research continued to expand and played an important part when subsonic flight was advanced and supersonic and hypersonic flight were introduced.{{citation needed|date=November 2011}} Langley Research Center can claim many historic firsts, some of which have proven to be revolutionary scientific breakthroughs. These accomplishments include the development of the concept of research aircraft leading to supersonic flight, the world's first transonic wind tunnels, the Lunar Landing Facility providing the simulation of lunar gravity, and the Viking program for Mars exploration.[12] The center also developed standards for the grooving of aircraft runways based on a previous British design used at Washington National Airport.[13] Grooved runways reduce aquaplaning which permits better grip by aircraft tires in heavy rain. This grooving is now the international standard for all runways around the world. AeronauticsLangley Research Center performs critical research on aeronautics, including wake vortex behavior, fixed-wing aircraft, rotary wing aircraft, aviation safety, human factors and aerospace engineering. LaRC supported the design and testing of the hypersonic X-43, which achieved a world speed record of Mach 9.6 (almost 7,000 miles per hour). LaRC assisted the NTSB in the investigation of the crash of American Airlines Flight 587.[14][15][14] Work began in July 2011 to remove the 1940s era {{convert|16|ft}} transonic wind tunnel. The facility supported development and propulsion integration research for many military aircraft including all fighters since 1960 (F-14, F-15, F-16, F-18 and the Joint Strike Fighter) but had been inactive since 2004.[16] Langley retained transonic wind tunnel testing capabilities facilities in the National Transonic Facility, a high pressure, cryogenically cooled {{convert|8.2|ft}} closed loop wind tunnel.[17] Fabrication research and developmentElectron beam freeform fabrication (EBF³){{advert section|date=March 2017}}The EBF³ process produces structural metallic parts with immense strength, useful in performing repairs in remote locations. Additionally, the ability to build functionally graded, unitized parts directly from CAD data offers enhanced performance in numerous applications. Recently, LaRC has become home to this new type of machining process, which is used by their new room-sized electron-emitting device, which uses a High Frequency 42 kW, X-ray emitting electron gun (similar to Cathode Ray Tubes), which quickly melts either aluminum or titanium wire (positioned by dual independent wire feeders) into the desired 3-dimensional metallic parts with a material strength comparable to that of wrought products. The machine's deposition rate is 150 in³/h (690 mm³/s), equivalent to its plastic-fabricating counterpart. Metallic parts are also built directly from CAD without molds or tools, leaving the end product with absolutely no porosity. Other properties include:
Overall, Electron Beam Freeform Fabrication is a layer-additive technique that offers potential for improvements in cost, weight, and performance to enhance mission success for aircraft, launch vehicles, and spacecraft. Plastic fabricationLaRC also houses a large collection of various inexpensive plastic reformation machines. These machines are critical in the freeform fabrication department for faster timing, better precision, and larger quantities of low-cost toy, model, and industrial plastic parts. The fabrication of plastic parts is not all that dissimilar to the EBF³ process, except the melting apparatus is a thin, grated heating element, but other than that they are quite similar, e.g. they are both run completely by CAD data and deal with various freeform fabrication of raw materials. Plastic reformation machines have also come to the interest of graphical artist, opening a whole new world of bringing their masterpieces to life, all with a 'flick' of a switch, so to speak.{{citation needed|date=November 2011}} AstronauticsMoonSince the start of Project Gemini, Langley was a center for training of rendezvous in space. In 1965, Langley opened the Lunar Landing Research Facility for simulations of moon landings with a mock Apollo Lunar Module suspended from a gantry over a simulated lunar landscape. There was experimental work on some Lunar Landing Research Vehicles (LLRV). MarsLangley Research Center supported NASA's mission by designing a spacecraft for a Mars landing. (see the Mars Exploration Rover.) Earth scienceLangley Research Center conducts earth science research to support NASA's mission. AwardsLRC scientists and engineers have won the Collier Trophy 5 times. In 1929 for the development of low-drag cowling for radial air-cooled aircraft engines, 1946 to Lewis A. Rodert, Lawrence D. Bell and Chuck Yeager for the development of an efficient wing deicing system, 1947 to John Stack of the then Langley Memorial Aeronautical Laboratory for research to determine the physical laws affecting supersonic flight, also shared in this trophy for their work on supersonic flight, 1951 to John Stack for the development and use of the slotted-throat wind tunnel, 1954 Richard T. Whitcomb for the development of the Whitcomb area rule, according to the citation, a "powerful, simple, and useful method of reducing greatly the sharp increase in wing drag heretofore associated with transonic flight, and which constituted a major factor requiring great reserves of power to attain supersonic speeds."[18] See also
References1. ^{{cite web|title=FY 2017 Agency Financial Report|url=https://www.nasa.gov/sites/default/files/atoms/files/afr_fy2017_final_11_15_17.pdf|website=NASA|accessdate=1 January 2018|archiveurl=https://web.archive.org/web/20180101215321/https://www.nasa.gov/sites/default/files/atoms/files/afr_fy2017_final_11_15_17.pdf|archivedate=1 January 2018|pages=10, 24, 146|date=15 November 2017}} 2. ^{{cite web|author1=Bob Allen|title=NASA Langley Research Center Organizational Chart|url=https://www.nasa.gov/image-feature/nasa-langley-research-center-organizational-chart|website=NASA Langley Research Center|accessdate=1 January 2018|archiveurl=https://archive.fo/20180101213640/https://www.nasa.gov/image-feature/nasa-langley-research-center-organizational-chart|archivedate=1 January 2018|date=28 August 2017|deadurl=yes|df=}} 3. ^1 {{cite web|author1=Bob Allen|title=Dr. David E. Bowles, Director, NASA Langley Research Center|url=https://www.nasa.gov/feature/langley/dr-david-e-bowles|website=NASA Langley Research Center|accessdate=1 January 2018|archiveurl=https://archive.fo/20180101212313/https://www.nasa.gov/feature/langley/dr-david-e-bowles|archivedate=1 January 2018|date=17 December 2015|quote=NASA Langley, founded in 1917, is the Nation's first civilian aeronautical research facility and NASA's oldest field center.|deadurl=yes|df=}} 4. ^1 {{cite web|author1=Bob Allen|title=Dr. David E. Bowles, Director, NASA Langley Research Center|url=https://www.nasa.gov/feature/langley/dr-david-e-bowles|website=NASA Langley Research Center|accessdate=1 January 2018|archiveurl=https://archive.today/20180101212313/https://www.nasa.gov/feature/langley/dr-david-e-bowles|archivedate=1 January 2018|date=17 December 2015|quote=Dr. David E. Bowles is the director of NASA's Langley Research Center, Hampton, Virginia. He joined the Director’s Office in March 2012 as Associate Director, progressed to Deputy Director in 2014 and then served as Acting Center Director for four months before being appointed Center Director in June 2015.}} 5. ^Aviation & Aeronautical Engineering, February 15, 1917 6. ^{{cite web|url= http://aviationweek.com/defense/aviation-week-s-warning-and-founding-nasa-langley |title=Aviation Week’s Warning and the Founding of NASA Langley |author=Joe Anselmo |publisher=Aviation Week & Space Technology |date=February 17, 2017|accessdate=March 7, 2017}} 7. ^{{cite news |first=Diane |last=Tennant |work=The Virginian-Pilot |title=What's in a name? NASA Langley Research Center |url=http://hamptonroads.com/2011/09/whats-name-nasa-langley-research-center |date=September 5, 2011 |accessdate=September 5, 2011}} 8. ^{{cite web | url = https://history.nasa.gov/monograph12/ch3.htm | title = Journey in Aeronautical Research: a Career at NASA-Langley Research Center, ch. 3 | publisher = NASA}} 9. ^[https://books.google.com/books?id=uSgDAAAAMBAJ&pg=PA26 "Faster, Safer Planes, Developed In Biggest Wind Tunnels"] Popular Science, April 1934 10. ^[https://books.google.com/books?id=wt8DAAAAMBAJ&pg=PA520 "Full-Size Planes Tested In Big Air Tunnel"] Popular Mechanics, April 1935, pp. 520–521 11. ^{{cite web |url=http://rotorcraft.arc.nasa.gov/Research/facilities/windtunnels.html |title=40 X 80 and 80 X 120 Foot Wind Tunnels |website=Rotorcraft.arc.nasa.gov |date= |accessdate=2016-02-14 |deadurl=yes |archiveurl=https://web.archive.org/web/20160304210532/http://rotorcraft.arc.nasa.gov/Research/facilities/windtunnels.html |archivedate=2016-03-04 |df= }} 12. ^{{cite web | url = http://gis.larc.nasa.gov/historic | title = NASA Langley History and Description: Initial Activities | publisher = NASA LaRC Master Plan}} 13. ^{{cite web|last1=McGuire|first1=R.C.|title=REPORT ON GROOVED RUNWAY EXPERIENCE AT WASHINGTON NATIONAL AIRPORT|url=https://archive.org/details/nasa_techdoc_19690011108|website=Internet Archive|publisher=Federal Aviation Administration|accessdate=5 February 2017}} 14. ^1 {{cite web|url=http://www.nasa.gov/missions/research/x43-main.html |title=NASA – Hypersonic X-43A Takes Flight |website=Nasa.gov |date= |accessdate=2016-02-14}} 15. ^{{cite web|url=http://gis.larc.nasa.gov/historic/ |title=NASA Cultural Resources (CRGIS) – NasaCRgis |website=Gis.larc.nasa.gov |date=2015-08-04 |accessdate=2016-02-14}} 16. ^{{cite web|url=http://www.dailypress.com/news/science/dead-rise-blog/dp-tearing-down-nasa-langleys-16foot-transonic-wind-tunnel-20110708,0,6972782.story |title=Tearing down NASA Langley's 16-foot transonic wind tunnel |publisher=Daily Press |date=2011-07-08 |accessdate=2016-02-14}} 17. ^{{cite web|url=http://www.aeronautics.nasa.gov/atp/facilities/ntf/index.html|title=National Transonic Facility|last=|first=|date=|website=|publisher=|access-date=|accessdate=November 14, 2011|deadurl=yes|archiveurl=https://web.archive.org/web/20111017175206/http://www.aeronautics.nasa.gov/atp/facilities/ntf/index.html|archivedate=October 17, 2011}} 18. ^{{cite web|url=http://www.nasa.gov/centers/langley/news/factsheets/LaRC_History.html |title=Exploring NASA's Roots – The History of the Langley Research Center | NASA |website=Nasa.gov |date=1992-12-31 |accessdate=2016-02-14}} External links{{Commons category|Langley Research Center}}
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