Download or read book Formation of Moving and Stationary Detonation Waves in Flowing Combustible Mixtures written by Rudolph Edse and published by . This book was released on 1967 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes experiments undertaken to determine the detonation properties of liquid RP-1 sprays in gaseous oxygen as a function of fuel and oxidizer temperature and mixture ratio. One of the more significant results observed was that when both the RP-1 and oxygen were tested to 92C, two different stable modes of detonation, each having a steady speed, occurred in the same experiment. The first detonation mode was non-oscillatory; the second mode was a spinning oscillatory detonation mode with a different constant velocity approximately 100 meters/second below that of the non-oscillatory mode. Induction properties were unrepeatable and random for the most part, leading to little basis for correlation of induction properties with tube diameter or type of igniter. Tube diameter and type of igniter seemed to have little effect on the resultant detonation velocities. The induction distances generally decreased with temperature increase. The large discrepancy found between theoretical and experimental wave speeds were thought to be caused by incomplete burning of the liquid droplets in the detonation wave front. (Author).

Download or read book Formation of Detonation Waves in Flowing Combustible Gaseous Mixtures and Liquid spray Mixtures written by Loren E. BOLLINGER and published by . This book was released on 1966 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detonation induction distances were determined in a 9-mm inside diameter detonation tube at an initial pressure of 1 atm at ambient initial temperature for hydrogen-oxygen mixtures flowing at initial velocities ranging from 1-100 meters/second and for methane-oxygen mixtures flowing at velocities ranging from 0-30 meters/second. Some experiments with hydrogen-oxygen mixtures were conducted at 5 atm initial pressure. The results show that the induction distances for hydrogen-oxygen mixtures decrease linearly with the logarithm of the Reynolds number based on the initial linear gas velocity. The induction distance of the detonation wave propagating upstream is shorter than that of the wave propagating downstream. Induction distances in methane-oxygen mixtures were essentially constant over the range of flow velocities employed. Certain observations seem to indicate that higher turbulence levels in the initial gas flow cause an effective decrease in the quenching diameter. (Author).

Download or read book Formation of Detonation Waves in Flowing Combustible Gaseous Mixtures written by Loren E. Bollinger and published by . This book was released on 1965 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detonation induction distances were measured in hydrogen-oxygen and methane-oxygen mixtures flowing at various velocities through a 9 stainless steel tube, 9 mm inside diam. The linear flow velocities of the gas mixture ranged from 0-100 m/sec in hydrogen-oxygen mixtures. Some experiments were conducted at 5 atm initial pressure. Experiments with methane-oxygen mixtures were carried out at 1 atm only; the initial velocities of these mixtures ranged from 0-30 m/sec. It was found that the formation of detonation waves in flowing combustible gaseous mixtures is dependent upon the initial pressure and the intensity of turbulence present in the gases. As the initial pressure is raised, the effect of turbulence becomes less pronounced. Higher turbulence levels cause an effective decrease in the quenching diam as indicated in these experiments. Higher flow rates for a methane-oxygen mixture (50 per cent fuel) insure positive ignition and positive measurement of flame propagation rates. (Author).

Download or read book OAR written by and published by . This book was released on 1967 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Force Research Resum s written by and published by . This book was released on with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OAR Cumulative Index of Research Results written by and published by . This book was released on 1967 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gaseous Detonations written by M.A. Nettleton and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: My introduction to the fascinating phenomena associated with detonation waves came through appointments as an external fellow at the Department of Physics, University College of Wales, and at the Department of Mechanical Engineering, University of Leeds. Very special thanks for his accurate guidance through the large body of information on gaseous detonations are due to Professor D. H. Edwards of University College of Wales. Indeed, the onerous task of concisely enumerating the key features of unidimensional theories of detonations was undertaken by him, and Chapter 2 is based on his initial draft. When the text strays to the use of we, it is a deserved acknow ledgement of his contribution. Again, I should like to thank Professor D. Bradley of Leeds University for his enthusiastic encouragement of my efforts at developing a model of the composition limits of detonability through a relationship between run-up distance and composition of the mixture. The text has been prepared in the context of these fellowships, and I am grateful to the Central Electricity Generating Board for its permission to accept these appointments.

Download or read book Formation of Detonation Waves in Combustible Gaseous Mixtures written by Loren E. BOLLINGER and published by . This book was released on 1964 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review is presented of selected papers and reports which pertain to the formation of detonation waves in combustible gaseous mixtures. During the past decade, extensive progress has been made in elucidating the mechanism, and the parameters that influence it, by which a deflagration wave accelerates and forms a stable detonation. Propulsion devices which employ stabilized detonation waves are being studied; thus, it is necessary to learn more about the transition process. Many investigators believe that a better understanding of the process of detonation-wave formation will assist in the explanation and eventual control of combustion instability in rocket engines. (Author).

Download or read book Experimental and Theoretical Studies on the Formation of Detonation Waves in Variable Geometry Tubes written by and published by . This book was released on 1963 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Force Research Resum s written by and published by . This book was released on 1966 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Formation of Detonation Waves in Hydrogen oxygen Mixtures from 0 2 to 2 Atmospheres Initial Pressure in a 54 meter Long Tube written by Loren E. Bollinger and published by . This book was released on 1964 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Force Research Resum s written by United States. Air Force. Office of Aerospace Research and published by . This book was released on 1966 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Behavior of a Detonation Wave in a Flowing Combustible Mixture written by William Wilfred McKenna and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An experimental investigation of shock initiated detonation waves in a flowing combustible mixture written by Leonard Anthony Hamilton and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High speed Photographic Investigation of the Formation of Detonation Waves in a Stoichiometric Hydrogen oxygen Mixture written by James A. Laughrey and published by . This book was released on 1964 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Structure of Detonation in Gaseous and Dispersed Media written by A.A. Borissov and published by Springer Science & Business Media. This book was released on 1991-08-31 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of late the demands of industry in creating new composite and functional materials with present properties stimulated an increased interest to the investigation of processes which occur in the detonation technologies of complex chemical composition with an additive of disperse particles. The collection includes a series of papers presented at the 3d International Conference "Lavrentyev Readings on Mathematics, Mechanics, and Physics" (Novosibirsk, 1990),was held by the Hydrodynamics Institute under the support of the Presidium of the Siberian Branch of the USSR Academy of Sciences to stimulate the international cooperation of the leading international centers. In the framework of this Conference the Round Table seminar was held by Prof. A. Borissov and Prof. V. Mi trofanov devoted to "Dynamic Structure of Detonation in Gaseous and Dispersed Media". The idea to hold such Round Table was supported by Chairman of Organizing Committee academician Prof. V.Titov from Hydrodynamics Institute, and academician Prof. V. Nakoryakov and also his Institute of Thermophysics. The main ideas discussed at the Round Table were presented in the form of papers which reflected present situation of the problem of dynamic structure of the detonation waves in gaseous and dispersed media. The basic experimental facts concerning of complicated mul ti dimensional non-stationary structure both of the detonation wave and its front surface, generation of the cell structure, the effect of transverse waves, obstacles, channel geometry etc. on the transition from dynamic regime to stationary structure are represented in the fist three papers.