+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Gross, L. P.  Author > Hsu, K.-Y.  Author > Roquemore, W. M.  Author > Trump, D. D.  NASA Center > NASA (non Center Specific)  Publication Year > 1991-2000 > 1994  Subject > G-I > Inorganic And Physical Chemistry  Availability Options > Online > PDF  Item/Media Type > Conference Paper  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Characteristics of a trapped-vortex (TV) combustor Author(s): Hsu, K.-Y.; Gross, L. P.; Trump, D. D.; Roquemore, W. M. Abstract: The characteristics of a Trapped-Vortex (TV) combustor are presented. A vortex is trapped in the cavity established between two disks mounted in tandem. Fuel and air are injected directly into the cavity in such a way as to increase the vortex strength. Some air from the annular flow is also entrained into the recirculation zone of the vortex. Lean blow-out limits of the combustor are determined for a wide range of annular air flow rates. These data indicate that the lean blow-out limits are considerably lower for the TV combustor than for flames stabilized using swirl or bluff-bodies. The pressure loss through the annular duct is also low, being less than 2% for the flow conditions in this study. The instantaneous shape of the recirculation zone of the trapped vortex is measured using a two-color PIV technique. Temperature profiles obtained with CARS indicate a well mixed recirculation zone and demonstrate the impact of primary air injection on the local equivalence ratio. NASA Center: NASA (non Center Specific) Publication Date: Nov 1, 1994 Document Source: CASI Online Source: View PDF File Document ID: 19950002746 Accession ID: 95N70866 Publication Information: Pennsylvania State Univ., NASA Propulsion Engineering Research Center, Volume 2, p 18-23, Number of Pages = 6 Price Code: A02 Keywords: AIR FLOW; ANNULAR DUCTS; ANNULAR FLOW; CAVITIES; COMBUSTION CHAMBERS; FLAMEOUT; FLOW VELOCITY; GAS INJECTION; NITROGEN; REACTING FLOW; SEPARATED FLOW; TRAPPED VORTICES; CAMERAS; CHARGE COUPLED DEVICES; DYE LASERS; EQUIVALENCE; NEODYMIUM LASERS; PARTICLE IMAGE VELOCIMETRY; RAMAN SPECTROSCOPY; TEMPERATURE PROFILES; VELOCITY DISTRIBUTION; Notes: In Pennsylvania State Univ., NASA Propulsion Engineering Research Center, Volume 2 p 18-23 (SEE N95-70861 07-12) Accessibility: Unclassified; No Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2008-11-18 + 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