Ram Accelerators : Proceedings of the Third International Workshop on Ram Accelerators Held in Sendai, Japan, 16–18 July 1997

Ram accelerators are among the most advanced tools for generating fluid dynamcis data in supersonic reacting systems. They require the combined action of combustion, wave systems and turbulence and are still a serious challenge for physicists and engineers. This book will serve as an introductionary textbook on ram accelerators and gives a thorough overview on research activities, performance modeling and high-pressure detonation dynamics. Front Matter....Pages I-XI Front Matter....Pages 1-1 The ram accelerator: overview and state of the art....Pages 3-23 Ram accelerator performance modeling....Pages 25-37 Real gas effects in ram accelerator propellant mixtures: theoretical concepts and applied thermochemical codes....Pages 39-52 Front Matter....Pages 53-53 High acceleration experiments using a multi-stage ram accelerator....Pages 55-64 RAMAC in subdetonative propulsion mode: State of the ISL studies....Pages 65-77 Presentation of the rail tube version II of ISL’s RAMAC 30....Pages 79-87 The behaviour of fin-guided projectiles superdetonative accelerated in ISL’s RAMAC 30....Pages 89-95 High performance ram accelerator research....Pages 97-104 Ignition study for low pressure combustible mixture in a ram accelerator....Pages 105-109 Thermally choked operation in a 25-mm-bore ram accelerator....Pages 111-118 37-mm bore ram accelerator of CARDC....Pages 119-122 Front Matter....Pages 123-123 Real gas effects on thermally choked ram accelerator performance....Pages 125-134 Numerical investigation on subdetonative mode ramjet-in-tube....Pages 135-142 On the optimization of thermally-choked ram accelerator systems....Pages 143-150 Prediction of surface heating of a projectile flying in RAMAC 30 of ISL....Pages 151-158 Ram accelerator optimization and use of hydrogen core to increase projectile velocity....Pages 159-166 Analysis and experimental results of a fin stabilized subcaliber projectile with a blunt step in the external propulsion accelerator....Pages 167-178 Front Matter....Pages 179-179 Effects of launch tube shock dynamics on initiation of ram accelerator operation....Pages 181-188 Overview of the subdetonative ram accelerator starting process....Pages 189-203 Diaphragm rupturing processes by a ram accelerator projectile....Pages 205-213 Front Matter....Pages 179-179 Numerical simulation of the unsteady processes in starting period of ram accelerator....Pages 215-221 RAMAC 90: detonation initiation of insensitive dense methane-based mixtures by normal shock waves....Pages 223-231 Front Matter....Pages 233-233 Comparison of numerical simulations and PLIF imaging results of hypersonic inert and reactive flows around blunt projectiles....Pages 235-242 Comparisons of numerical methods for the analysis of unsteady shock-induced combustion....Pages 243-254 On the detonation initiation by a supersonic sphere....Pages 255-262 Experimental observation of oblique detonation waves around hypersonic free projectiles....Pages 263-270 Numerical prediction of envelope oscillation phenomena of shock-induced combustion....Pages 271-278 Front Matter....Pages 279-279 Experimental investigation of ram accelerator flow fields and combustion kinetics....Pages 281-294 Accelerating hydrogen/air mixtures to superdetonative speeds using an expansion tube....Pages 295-302 Front Matter....Pages 303-303 Numerical simulations of unsteady ram accelerator flow phenomena....Pages 305-312 Numerical investigation of ram accelerator flow field in expansion tube....Pages 313-323 CFD computations of steady and non-reactive flow around fin-guided ram projectiles....Pages 325-332 Ignition of a reactive gas by focusing of a shock wave....Pages 333-339 Back Matter....Pages 341-345 Lecture Notes Facilities and Experiments Performance Prediction Starting Processes Hypersonic Blunt Body in Chemically Reacting Flows Diagnostics Computational Fluid Dynamics.