Download or read book Superfast Homogeneous Plasma Ignition of Hydrogen Oxygen and Air Fuel Supersonic Flows by High Voltage Ionization Wave written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report results from a contract tasking Moscow Inst. of Physics and Technology as follows: 1) The contractor will perform experiments on ignition initiation by ionization wave in the H2-O2 mixture. Determine the ignition threshold shift. Study the combustion uniformity and synchronization in the system. 2) He will determine the active particle formation rate in ionization wave with the nanosecond time resolution. Measure electric field of ionization wave in hydrogen. Develop a numerical model determining the active particles generation in the fast ionization wave. Verify the numerical model with the use of experimental data.
Download or read book AIAA Aerospace Sciences Meeting and Exhibit 42nd written by and published by . This book was released on 2004 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unsteady Supersonic Combustion written by Mingbo Sun and published by Springer Nature. This book was released on 2020-04-14 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the unsteady phenomena needed to understand supersonic combustion. Following an initial chapter that introduces readers to the basic concepts in and classical studies on unsteady supersonic combustion, the book highlights recent studies on unsteady phenomena, which offer insights on e.g. interactions between acoustic waves and flames, flow dominating instability, ignition instability, flame flashback, and near-blowout-limit combustion. In turn, the book discusses in detail the fundamental mechanisms of these phenomena, and puts forward practical suggestions for future scramjet design.
Download or read book Ignition and Supersonic Burning of Air Fuel Mixtures Initiated by Electrical Discharges written by and published by . This book was released on 2005 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report results from a contract tasking Moscow State University as follows: The contractor will investigate the use of pulsed plasma jets and transversal pulsed-periodic discharges to ignite and efficiently combust hydrocarbon fuel/air mixtures in supersonic flows. Effects of pulse duration pulse power. electrode material and operating frequency will be determined for both propane/air and kerosene/air mixtures over equivalence rations from 0.3 to 1.0 at Mach 1.5, 2.0 and 3.0. Diagnostics will be used to determine the radiation spectra for the different discharges in the supersonic flow. Measurements of chemical radical and electron concentrations will also be made. Corresponding numerical simulations will be compared to the experimental data.
Download or read book Criteria for Self ignition of Supersonic Hydrogen air Mixtures written by Paul William Huber and published by . This book was released on 1979 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supersonic Combustion in Premixed Hydrocarbon air Flow written by J. TAMAGNO and published by . This book was released on 1966 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the mechanisms of ignition and flame propagation of supersonic air-hydrogen fuel mixtures at temperatures below the published autoignition limits was made. The hydrocarbons considered were: methane (CH4), ethane (C2H6), ethylene (C2H4) and propane (C3H8) with flame ignition and stabilization by means of a small hydrogen-oxygen pilot flame. Flame speeds for methane, ethane, and ethylene-air mixtures were found to be: four, three and two times smaller, respectively than hydrogen-air flame speeds under similar flow conditions. The dependence of the flame speed on the initial mixture temperature was correlated by a simple exponential relation. Addition of a small amount of hydrogen to a methane-air mixture resulted in doubling the observed flame angle. Finally, measurements of flame temperature distribution and spreading rate were shown to be in agreement with results of a theoretical analysis incorporating finite rate methane-air chemistry and axisymmetric diffusive flow. (Author).
Download or read book Ignition of Hydrogen oxygen Rocket Combustor with Chlorine Trifluoride and Triethylaluminum written by John W. Gregory and published by . This book was released on 1961 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of Supersonic Hydrogen air Flames for Scramjet Applications written by Hwanil Huh and published by . This book was released on 1996 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Induced Ignition and Plasma Assisted Combustion in High Speed Flow written by and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper is dedicated to the experimental demonstration of plasma technology abilities in the field of high speed combustion. It is doing in three principal directions: control of the structure and the parameters of the duct driven flows; the ignition of air fuel composition at low mean gas temperature; and the mixing intensification inflow.
Download or read book Toward Plasma Assisted Ignition in Scramjets written by and published by . This book was released on 2003 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force plasma ignition program is assessing the prospect of main-fuel ignition with plasma generating devices in a supersonic flow. As the study progresses baseline conditions of operation are being established such as the required operational time of the device to initiate a combustion shock train. The two plasma torches currently under investigation consist of a DC constricted-arc design from the Virginia Polytechnic Institute and State University and an AC unconstricted-arc design based on a modified spark-plug from Polytechnic University. The plasma torches are realistic in size and operate within current power constraints while differing substantially in orifice geometry. In order to compare the potential of each concept the flow physics of each part of the igniter/fuel-injector/combustor system are being studied. In each step of the program, we utilize CFD and experiments to help define and advance the ignition process. To understand the constraints involved with ignition process of a hydrocarbon fuel jet an experimental effort to study gaseous and liquid hydrocarbons is underway, involving the testing of ethylene and JP-7 fuels with nitrogen and air plasmas. Results from the individual igniter studies have shown the plasma igniters to produce hot pockets of highly excited gas with peak temperatures up to (and in some cases above) 5000 K at only 2-kW total input power. In addition ethylene and JP-7 flames with a significant level of OH as determined by OH PLIF were also produced in a Mach-2 supersonic flow with a total temperature and pressure of 590 K and 5.4 atm respectively.
Download or read book A Study of the Mixing of Hydrogen Injected Normal to a Supersonic Airstream written by R. Clayton Rogers and published by . This book was released on 1971 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jet to free-stream dynamic pressure ratio effects on penetration and mixing of hydrogen injected normal to supersonic airstreams.
Download or read book Study of Internal and External Plasma Assisted Combustion in Supersonic Gas Flow written by and published by . This book was released on 2005 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Project is devoted to basic study on the field of external and internal plasma assisted combustion. This effort consists of three Tasks: Task #1 is titled "Internal plasma assisted combustion controlled by improved plasma generators in metal channel at conditions similar to Scramjet"; Task #2 is tilted "External plasma combustion experiment in a supersonic flow (Mtilde2, Pst=1 Bar)". This is a study of flow around model F with plasma combustion generator in wind tunnel; Task #3 is tilted "Study of supersonic flow around model E with combined plasma generator (PG Comb= PG HF +E beam)". Here. the main plasma parameters could be changed independently in PG- Comb. Electron concentration will be controlled by E-beam. Electron temperature could be controlled by external HF electric field. The main goals of this work is a study of following: Optimal radical generation in fuel/air mixture and combustion control by non equilibrium plasmoids, Advanced mixture of fuel in gas flow by structural plasmoids.
Download or read book Hypersonic Engine Leading Edge Experiments in a High Heat Flux Supersonic Flow Environment written by and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ignition of Hydrogen oxygen Rocket Engines with Fluorine written by and published by . This book was released on 1959 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Distributions of a Cesium seeded Hydrogen oxygen Supersonic Free Jet written by S. Y. Wang and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrogen-oxygen plasma was generated at combustion chamber pressures ranging from 0.5 to 2.0 megapascals and for various seed ratios (1 to 10 percent). The plasma was observed as the atmospheric exhaust from a Mach 2 rocket test facility. Transverse profiles of the absolute integrated intensity were measured with the optically thin CsI lines (0.5664 and 0.5636 microns) at a range of axial positions downstream of the 5-cm-diameter combustor nozzle exit. Radial profiles of the emission coefficient were obtained from the measured transverse profiles of intensity by Abel inversion. Temperatures were then determined from the emission coefficients for conditions of local thermodynamic equilibrium using particle densities generated by a two-dimensional free jet computer program. Temperature results show the inherent effects of compression and expansion pressure waves characteristic of a free jet exiting from a supersonic nozzle.
Download or read book A Preliminary Study of Stationary Shock induced Combustion with Hydrogen air Mixtures written by R. P. Rhodes and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: DESCRIPTORS: Rocket motors *Hydrogen, *Air, *Combustion, *Ignition, Gases, Shock waves, Fuel injection, Fuel injectors, Supersonic flow, Schlieren photography, Mixtures, Combustion cham ers, Combustion chamber gas s. A study of the shock-induced combustion of hydrogen-air mixtures was made in a small Mach number 3 wind tunnel at a total pressure level of 45 psia. Combustion was induced by a normal shock wave which resulted from the interaction of two oblique shock wave produced by wedges on the tunnel walls. Significantly different phenomena were observed when the fuel injector was moved from the subsonic portion of the n zzle into the throat. With fuel injection in the throat, ignition denoted by emission glow from the sodium introduced with the hydrogen did not occur until some distance downstream of the normal shock wave. Some data are presented showing this delay as a function of the static temperature behind the shock wave. (A thor).
Download or read book The Ignition of Slot injected Gaseous Hydrogen in a Supersonic Air Stream written by Joseph A. Schetz and published by . This book was released on 1966 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
