Published 1988 by Dept. of Aeronautics and Astronautics University of Washington, National Aeronautics and Space Administration, National Technical Information Service, distributor in Seattle, WA, [Washington, DC, Springfield, Va .
Written in EnglishRead online
|Statement||prepared by Michael Aarnio ... [at al.]|
|Series||NASA contractor report -- NASA CR-184748|
|Contributions||Aarnio, Michael, United States. National Aeronautics and Space Administration|
|The Physical Object|
Download Design of a ram accelerator mass launch system
The ram accelerator is a hypervelocity mass launcher in which a subcaliber projectile, shaped like the centerbody of a ramjet engine, is accelerated through a tube containing gaseous fuel and.
Because RAM Foundation is integrated into the RAM Structural System, it uses the same model and database as RAM Frame and RAM Steel when designing foundations.
In order for the program to design the foundations, the loads must be determined by running the gravity column design and/or lateral analysis in RAM Frame.
process, improve understanding of the ﬂowﬁeld in the launch tube and ram accelerator tube, and investigate the effects of Mach number, propellant chemistry, obturator geometry and mass, and throat area variations on the starting process.
About this book. About this book. 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. In this article we cover ten settings in RAM Structural System that can have a drastic impact on how your model behaves both analytically and during the design process. Many of the items listed are most relevant to concrete-framed buildings.
Ram accelerator direct space launch system - New concepts. David W. Bogdanoff ; David W. Bogdanoff. Eloret Institute, Palo Alto, California On the optimization of thermally-choked ram accelerator systems.
Scaling and simulation issues in ram accelerator projectile design. Get this from a library. Design of a ram accelerator mass launch system: spacecraft System Design, AA /C. NASA/USRA Advanced Space Design Program. [Michael Aarnio; United States. National Aeronautics and Space Administration.;].
A feedback controlled gas mixing system for the ram accelerator Acta Astronautica, Vol. 37 Effect of finite rate chemical reactions on ram accelerator thrust characteristics.
Design of a ram accelerator mass launch system The ram accelerator mass launch system has been proposed to greatly reduce the costs of placing acceleration-insensitive payloads into low earth orbit. The ram accelerator is a chemically propelled, impulsive mass launch system capable of efficiently accelerating relatively large masses from velocities of km/sec to 10 km/sec.
The Bussard ramjet is a theoretical method of spacecraft propulsion proposed in by the physicist Robert W. Bussard, popularized by Poul Anderson's novel Tau Zero, Larry Niven in his Known Space series of books, Vernor Vinge in his Zones of Thought series, and referred to by Carl Sagan in the television series and book Cosmos.
Bussard proposed a ramjet variant of a fusion rocket capable of. A ram accelerator is a device for accelerating projectiles or just a single projectile to extremely high speeds using jet-engine-like propulsion cycles based on ramjet or scramjet combustion processes.
It is thought to be possible to achieve non-rocket spacelaunch with this technology. It consists of a long tube (barrel) filled with a mixture of combustible gases with a frangible diaphragm at.
Potential applications of the ram accelerator include hypervelocity impact studies, hypersonic propulsion research, and direct launch of acceleration-insensitive payloads to low Earth orbit.
More detailed information about the ram accelerator's history and various research topics are available on these pages and the links to related research sites. Select Design – RAM Frame or click the 4th square button that depicts part of a braced frame. When the framing process is complete, a three dimensional wire-frame view of your model will appear on the screen.
The RAM Frame program has a toolbar from which many commands can be issued with just a click of the mouse button. 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. Use our Build and Price tool to customize your Ram exactly how you want it. Choose the color, trim, options and more and easily calculate the costs.
A mass driver or electromagnetic catapult is a proposed method of non-rocket spacelaunch which would use a linear motor to accelerate and catapult payloads up to high speeds.
All existing and contemplated mass drivers use coils of wire energized by electricity to make tial firing of a row of electromagnets accelerates the payload along a path.
This page contains the RAM Structural System V8i - Release 14 Tutorial. Note: A PDF copy of this tutorial is also available offline in the \manuals\ folder where you installed RAM Structural System (for example, C:\Program Files\Bentley\Engineering\RAM Structural System\manuals\). Disclaimer. The software and related documentation, including this documentation, are protected by.
The ram accelerator is a chemically powered hypervelocity mass driver that operates with intube propulsive cycles similar to airbreathing ramjets and scramjets. The launcher consists of a long tube filled with a pressurized gaseous fuel-oxidizer mixture in which a subcaliber projectile having the shape similar to that of a ramjet centerbody is accelerated.
The ram accelerator is easily scalable for a variety of interesting applications ranging from hypersonics research to direct launch of acceleration-insensitive payloads to orbit. Growing interest in this technology has motivated the establishment of several ram accelerator research facilities throughout the world.
A low mass (50 gm) projectile geometry was developed that can be reliably accelerated up to the Chapman-Jouguet detonation speed of the propellant in a 38 mm bore ram accelerator.
Experiments were performed in CH 4 /O 2 /He propellants wherein Mach number and heat release of combustion were varied to obtain very high projectile acceleration. system parameters. Accelerator mass spectrometry (AMS) is an extension of MS including an accelerator.
In Figure 2 an MS system is compared with a simple AMS system. The introduction of the tandem accelerator, followed by several ion-ﬁltering devices reduces the background by a factor of the order of Three. One or more ram accelerator devices may be used to form one or more holes in geologic or other material.
These holes may be used for drilling, tunnel boring, excavation, and so forth. The ram accelerator includes one or more baffles that are downhole. The ram accelerator devices propel projectiles which are accelerated by combustion of one or more combustible gasses in a ram effect to.
The RAM Structural System also includes a module for the design of foundations. Like the other modules, the foundations need to be modeled in the Modeler before they can be designed and they can be modeled even if no license for the Foundation Design module is available.
Below is a reference for the final foundation layout. at ram accelerator is not a gun and will not carry peop le, but it is a radical new method of sending acceleration-insensitive payloads into space, that is, payloads that don'tdeform under high launch acceleration.
The accelerator was conceived, and. The ram accelerator can operate at in-tube Mach numbers up to ~8, which corresponds to ~8 km/s in H2-O2 propellants, thus it has the potential to launch projectiles at orbital velocities. Proof-of-principle was first demonstrated at mm-bore in the UW ram accelerator facility in For the details, look at a design study produced by my old research group at the University of Washington, Seattle: Kaloupis, P., Bruckner, A.P., "The Ram Accelerator: A Chemically Driven Mass Launcher," AIAAAIAA/ASME/SAE/ASEE 24th Joint Propulsion Conference, JulyBoston, MA.
Get to know your favorite Ram Truck vehicles with our complete online catalog. See all of our Makes, Models, and Trims or get a detailed brochure by mail. The Electromagnetic Aircraft Launch System (EMALS) is a type of aircraft launching system developed by General Atomics for the United States system launches carrier-based aircraft by means of a catapult employing a linear induction motor rather than the conventional steam was first installed on the United States Navy's Gerald R.
Ford-class aircraft carrier, USS Gerald R. The ram accelerator belongs to the transverse gas gun family because the hydrogen flow is transverse to the projectile direction. The minimum mass (for 1-ton cargo) is 10 4 tons. The maximum velocity is unknown. ORIGINAL RAM ACCELERATOR.
The original ram accelerator is a steel tube filled with a gaseous mixture of fuel, oxidizer, and diluent. The total length of the ram acceleration tube is 6 m. It uses a powder gun as a pre-accelerator.
The propellant mixture is supplied through a system composed of mass flow controllers and backpressure regulators. Pressure signals are recorded through multiplexer systems, thereby saving the number of channels of the data storage device.
a significant projectile mass reduction would allow higher velocities at the current thrust levels which are achievable existing launch facilities. in this program, sparta will investigate the feasibility and payoff of designing ram accelerator projectiles using advanced high specific strength composite materials.
Over View of System Analysis and Design Business System Concepts Characteristics of a System Elements of a System Types of Systems Systems Models Categories of Information Summary Questions Objectives • Defining a system • The role of computer in information systems.
RAM - Overview • RAM (random access memory) – read and write to any location given a valid address – Historically term had more meaning when tape drives and punched cards were used for mass storage.
– Today hard disks are ‘almost’ random, and modern RAM is ‘not completely’ random. A proposal to use a hybrid system combining a mass driver for initial lofting followed by additive thrust by a series of ground-based lasers sequenced according to wavelength was proposed by Mashall Savage in the book The Millennial Project as one of the core theses of the book, but the idea has not been pursued to any notable degree.
thermal protection and avionics systems. Building upon the best of Apollo and shuttle-era design, the Orion spacecraft includes both crew and service modules, a spacecraft adaptor, and a revolutionary launch abort system that will signiﬁ cantly increase crew safety.
Orion’s crew module is much larger than Apollo’s and. A ram accelerator has the same function as a gun; i.e., it is a device for accelerating projectiles; however, it is entirely different in that jet-engine-like propulsion cycles utilizing ramjet and/or scramjet combustion processes are used to accelerate a projectile to extremely high speeds.
It is one possible means of Non-rocket spacelaunch. It is a long tube (barrel) filled with a mixture. The thrust is then equal to the exit mass flow rate times the exit velocity minus the free stream mass flow rate times the free stream velocity. F = (m dot * V)e - (m dot * V)0 The first term on the right hand side of this equation is usally called the gross thrust of the engine, while the second term is called the ram drag.
It is a drag term. Table 1: A comparison of the classroom particle accelerator (the CRT) and CERN’s LHC; Characteristic CRT LHC; Pressure (For comparison, a vacuum cleaner has a pressure of 1‒ atm, and outer space has a pressure of.
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System to prevent a transition to turbulent flow early in the flight when heating was at its highest. Requirements for the Thermal Protection System extended beyond the nominal trajectories.
For abort scenarios, the systems had to continue to perform in drastically different environments. These scenarios included: Return-to-Launch Site; Abort Once.The new design will use positrons, which make gamma rays with about times less energy.
The NIAC research is a preliminary study to see if the idea is feasible. If it looks promising, and funds are available to successfully develop the technology, a positron-powered spaceship would have a couple advantages over the existing plans for a human.A coilgun, also known as a Gauss rifle, is a type of mass driver consisting of one or more coils used as electromagnets in the configuration of a linear motor that accelerate a ferromagnetic or conducting projectile to high velocity.
In almost all coilgun configurations, the coils and the gun barrel are arranged on a common axis. A coilgun is not a rifle as the barrel is smoothbore (not rifled).