Download or read book Analysis of Scramjet with MHD Bypass written by and published by . This book was released on 2003 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The propositions to use the MHD systems to control flow in a scramjet channel were put forward in development of the "M AJAX" concept. The paper 1, in which the basic principles for the MHD control in a scramjet were described for the first time in detail, was published in 1998. The main emphasis in the paper was put on analyzing the scramjet scheme with the control system composed of the MHD generator located upstream of the combustion chamber and the MHD accelerator located downstream of the combustion chamber, see the Fig. 1. The "Magneto Plasma Chemical Engine" title was used in the paper for designation of the engine. At present the title "Scramjet with MHD bypass" is frequently used for the engine designation. Perhaps the title is more obvious met to the scheme. It was shown in the paper 1 that the MHD bypass in a scramjet allows one to increase the scramjet specific impulse. In addition the functional relation which determines requirements for the engine subsystems, at which the MHD bypass leads to increasing the scramjet specific impulse, is obtained in the paper 1. In the subsequent papers 2-5 the propulsion was analyzed in more complicated physical model taking into account the problems of creation of nonequilibrium conductivity of flow in the MHD generator channel. In the papers the requirements for parameters of the magnetic system, the ionizer, the MHD generator and the scramjet, at which the MHD bypass increases the scramjet specific impulse, are formulated. Despite of the considerable progress in investigation of the propulsion the results obtained in 1.5 don't establish clearly the reason which is responsible for increase the scramjet specific impulse due to the MHD control. Probably the not full clarity of results obtained in the papers 1-5 is caused in the first place by the non-traditional approach 6, which is very useful for the system analysis but does not give the clearness of the results obtained, was used for the MHD systems7.
Download or read book Quasi One dimensional Analysis on MHD Energy Bypass Scramjet Engine Performance written by Susumu Kaminaga and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Analysis on MHD Energy Bypass Scramjet Engine Characteristics written by and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quasi-one dimensional numerical simulation throughout an engine was carried out for detailed performance analysis. Simple scramjet engine model including inlet, MHD generator, combustor, MHD accelerator, and expansion nozzle was introduced. MacCormack method was employed for unsteady numerical simulations. Maximum combustor exit stagnation temperature was set for the operating condition. Engine performance was evaluated by inlet-to-exit thrust normalized by mass flow rate. Dependency of engine performance on flight Mach number was investigated. MHD generator bad successfully reduced the stagnation temperature prior to the combustor which enabled greater energy injection at the combustor. Therefore, by introducing the MHD energy bypass system, scramjet engine was shown to improve its thrust performance at high Mach number conditions. Qualitative agreement with analytical calculation was obtained, although the phenomenon of thermal choking in the MHD generator and the combustor was found as operating limitations. Strong dependence of thrust on channel configurations were also found.
Download or read book Thermodynamic Cycle Analysis of Magnetohydrodynamic bypass Hypersonic Airbreathing Engines written by R. J. Litchford and published by . This book was released on 2000 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prospects for realizing a magnetohydrodynamic (MHD) bypass hypersonic airbreathing engine are examined from the standpoint of fundamental thermodynamic feasibility. The MHD-bypass engine, first proposed as part of the Russian AJAX vehicle concept, is based on the idea of redistributing energy between various stages of the propulsion system flow train. The system uses an MHD generator to extract a portion of the aerodynamic heating energy from the inlet and an MHD accelerator to reintroduce this power as kinetic energy in the exhaust stream. In this way, the combustor entrance Mach number can be limited to a specified value even as the flight Mach number increases. Thus, the fuel and air can be efficiently mixed and burned within a practical combustor length, and the flight Mach number operating envelope can be extended. In this paper, we quantitatively assess the performance potential and scientific feasibility of MHD-bypass engines using a simplified thermodynamic analysis. This cycle analysis, based on a thermally and calorically perfect gas, incoporates a coupled MHD generator-accelerator system and accounts for aerodynamic losses and thermodynamic process efficiencies in the various engine components. It is found that the flight Mach number range can be significantly extended; however, overall performance is hampered by non-isentropic losses in the MHD devices.
Download or read book Performance Study of MHD bypass Scramjet Inlets with Chemical Non equilibrium written by Prasanta Deb and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Study of MHD bypass Scramjet Inlets with Finite rate Chemistry written by Prasanta Deb and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Energy Warfare and the Challenges of Stealth Technology written by Bahman Zohuri and published by Springer Nature. This book was released on 2020-03-18 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a solid foundation for understanding radar energy warfare and stealth technology. The book covers the fundamentals of radar before moving on to more advanced topics, including electronic counter and electronic counter-counter measures, radar absorbing materials, radar cross section, and the science of stealth technology. A final section provides an introduction to Luneberg lens reflectors. The book will provide scientists, engineers, and students with valuable guidance on the fundamentals needed to understand state-of-the-art radar energy warfare and stealth technology research and applications.
Download or read book Classic and High Enthalpy Hypersonic Flows written by Joseph J.S. Shang and published by CRC Press. This book was released on 2023-04-28 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classic and High-Enthalpy Hypersonic Flows presents a complete look at high-enthalpy hypersonic flow from a review of classic theories to a discussion of future advances centering around the Born-Oppenheim approximation, potential energy surface, and critical point for transition. The state-of-the-art hypersonic flows are defined by a seamless integration of the classic gas dynamic kinetics with nonequilibrium chemical kinetics, quantum transitions, and radiative heat transfer. The book is intended for graduate students studying advanced aerodynamics and taking courses in hypersonic flow. It can also serve as a professional reference for practicing aerospace and mechanical engineers of high-speed aerospace vehicles and propulsion system research, design, and evaluation. Features Presents a comprehensive review of classic hypersonic flow from the Newtonian theory to blast wave analogue. Introduces nonequilibrium chemical kinetics to gas dynamics for hypersonic flows in the high-enthalpy state. Integrates quantum mechanics to high-enthalpy hypersonic flows including dissociation and ionization. Covers the complete heat transfer process with radiative energy transfer for thermal protection of earth reentry vehicle. Develops and verifies the interdisciplinary governing equations for understanding and analyzing realistic hypersonic flows.
Download or read book External MHD Generators with Nonequilibrium Ionization for Scramjet Inlet Control written by and published by . This book was released on 2003 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetohydrodynamic (MHD) control of forebody flow compression and shock incidence in scramjet inlets at Mach 5-10 is explored. Due to the low static temperature, nonequilibrium electrical conductivity is created by electron beams injected into the gas along magnetic field lines. Two-dimensional inviscid steady-state flow equations are solved jointly with equations describing electron beam-induced ionization profiles, plasma kinetics, and MHD equations. The principal focus of this paper is on inlet control at flight Mach numbers higher than the design value. The shocks that would otherwise enter the inlet can be moved back to the cowl lip by placing an MHD generator at one of the compression ramps. Analysis shows that the best performance of such a device (minimal losses of total pressure) is achieved with a very short MHD region in conjunction with high-current ionizing electron beam; the MHD region should be placed as far upstream (close to the vehicle nose) as possible. Computed inlet performance parameters are quite high. Critical issues, including magnet size and a possible ionization instability, are discussed. An MHD energy bypass scenario with on-ramp MHD generator for inlet control is briefly discussed.
Download or read book Plasma Dynamics for Aerospace Engineering written by Joseph J. S. Shang and published by Cambridge University Press. This book was released on 2018-06-21 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable resource summarizes the past fifty years' basic research accomplishments in plasma dynamics for aerospace engineering, presenting these results in a comprehensive volume that will be an asset to any professional in the field. It offers a comprehensive review of the foundation of plasma dynamics while integrating the most recently developed modeling and simulation techniques with the theoretic physics, including the state-of-the-art numerical algorithms. Several first-ever demonstrations for innovations and incisive explanations for previously unexplained observations are included. All the necessary formulations for technical evaluation to engineering applications are derived from the first principle by statistic and quantum mechanics, and led to physics-based computational simulations for practical applications. The computer-aided procedures directly engage the reader to duplicate findings that are nearly impossible by using ground-based experimental facilities. Plasma Dynamics for Aerospace Engineering will allow readers to reach an incisive understanding of plasma physics.
Download or read book Materials Needs and R D Strategy for Future Military Aerospace Propulsion Systems written by National Research Council and published by National Academies Press. This book was released on 2011-07-20 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ongoing development of military aerospace platforms requires continuous technology advances in order to provide the nation's war fighters with the desired advantage. Significant advances in the performance and efficiency of jet and rocket propulsion systems are strongly dependent on the development of lighter more durable high-temperature materials. Materials development has been significantly reduced in the United States since the early 1990s, when the Department of Defense (DOD), the military services, and industry had very active materials development activities to underpin the development of new propulsion systems. This resulted in significant improvements in all engine characteristics and established the United States in global propulsion technology. Many of the significant advances in aircraft and rocket propulsion have been enabled by improved materials and, materials manufacturing processes. To improve efficiency further, engine weight must be reduced while preserving thrust. Materials Needs and Research and Development Strategy for Future Military Aerospace Propulsion Systems examines whether current and planned U.S. efforts are sufficient to meet U.S. military needs while keeping the U.S. on the leading edge of propulsion technology. This report considers mechanisms for the timely insertion of materials in propulsion systems and how these mechanisms might be improved, and describes the general elements of research and development strategies to develop materials for future military aerospace propulsion systems. The conclusions and recommendations asserted in this report will enhance the efficiency, level of effort, and impact of DOD materials development activities.
Download or read book Scramjet Propulsion written by E. T. Curran and published by AIAA. This book was released on 2001 with total page 1354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 43rd AIAA Aerospace Sciences Meeting Exhibit written by and published by . This book was released on 2005 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 36th AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit 2000 3700 2000 3749 written by and published by . This book was released on 2000 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Fluid Mechanics and Heat Transfer written by Dale Anderson and published by Taylor & Francis. This book was released on 2016-04-19 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly updated to include the latest developments in the field, this classic text on finite-difference and finite-volume computational methods maintains the fundamental concepts covered in the first edition. As an introductory text for advanced undergraduates and first-year graduate students, Computational Fluid Mechanics and Heat Transfer, Thi
Download or read book Computational Fluid Dynamics for the 21st Century written by Mohamed Hafez and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains new trends of computational fluid dynamics for the 21st century and consists of papers especially useful to the younger generation of scientists and engineers in this field. Topics include cartesian, gridless and higher-order schemes, and flow-visualization techniques.
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 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
