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Author :
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (317 download)
Download or read book Nuclear Thermal Rocket/vehicle Design Options for Future NASA Missions to the Moon and Mars written by and published by . This book was released on 1995 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanley K. Borowski
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Nuclear Thermal Rocket/vehicle Design Options for Future NASA Missions to the Moon and Mars written by Stanley K. Borowski and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 518 pages
Book Rating : 4.:/5 (317 download)
Download or read book Nuclear Thermal Propulsion: A Joint NASA/DOE/DOD Workshop written by and published by . This book was released on 1991 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Investigations and Oversight
Publisher :
ISBN 13 :
Total Pages : 434 pages
Book Rating : 4.F/5 ( download)
Download or read book The Development of Nuclear Thermal Propulsion Technology for Use in Space written by United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Investigations and Oversight and published by . This book was released on 1993 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (317 download)
Download or read book The Rationale/benefits of Nuclear Thermal Rocket Propulsion for NASA's Lunar Space Transportation System written by and published by . This book was released on 1994 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : DIANE Publishing
ISBN 13 : 1428995625
Total Pages : 54 pages
Book Rating : 4.4/5 (289 download)
Download or read book Vehicle and mission design options for the human exploration of Mars/Phobos using "Bimodal" NTR and LANTR propulsion written by and published by DIANE Publishing. This book was released on with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Howard R. Schmidt
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Nuclear Rocket written by Howard R. Schmidt and published by . This book was released on 1960 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fundamental and practical survey is made of nuclear rocket application to space vehicle propulsion. The engine is described and propellant and radiation effects are discussed. Project Rover is summarized and performance requirements for a space vehicle are discussed. It is concluded that nuclear rockets can provide substantial performance, reliability, and economic advantages for difficult space missions. (T.R.H.).
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781729207581
Total Pages : 52 pages
Book Rating : 4.2/5 (75 download)
Download or read book Vehicle and Mission Design Options for the Human Exploration of Mars/Phobos Using Bimodal Ntr and Lantr Propulsion written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-25 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nuclear thermal rocket (NTR) is one of the leading propulsion options for future human missions to Mars because of its high specific impulse (Isp-850-1000 s) capability and its attractive engine thrust-to-weight ratio (approximately equal 3-10). To stay within the available mass and payload volume limits of a "Magnum" heavy lift vehicle, a high performance propulsion system is required for trans-Mars injection (TMI). An expendable TMI stage, powered by three 15 thousand pounds force (klbf) NTR engines is currently under consideration by NASA for its Design Reference Mission (DRM). However, because of the miniscule burnup of enriched uranium-235 during the Earth departure phase (approximately 10 grams out of 33 kilograms in each NTR core), disposal of the TMI stage and its engines after a single use is a costly and inefficient use of this high performance stage. By reconfiguring the engines for both propulsive thrust and modest power generation (referred to as "bimodal" operation), a robust, multiple burn, "power-rich" stage with propulsive Mars capture and reuse capability is possible, A family of modular "bimodal" NTR (BNTR) vehicles are described which utilize a common "core" stage powered by three 15 klbf BNTRs that produce 50 kWe of total electrical power for crew life support, an active refrigeration / reliquification system for long term, "zero-boiloff" liquid hydrogen (LH2) storage, and high data rate communications. An innovative, spine-like "saddle truss" design connects the core stage and payload element and is open underneath to allow supplemental "in-line" propellant tanks and contingency crew consumables to be easily jettisoned to improve vehicle performance. A "modified" DRM using BNTR transfer vehicles requires fewer transportation system elements, reduces IMLEO and mission risk, and simplifies space operations. By taking the next logical step--use of the BNT
Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (727 download)
Download or read book Pressure Fed Nuclear Thermal Rockets for Space Missions written by and published by . This book was released on 1989 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Space Policy includes a long range goal of expanding human presence and activity beyond Earth orbit into the solar system. This has renewed interest in the potential application of Nuclear Thermal Rockets (NTR) to space flight, particularly for human expeditions to the Moon and Mars. Recent NASA studies consider applications of the previously developed NERVA (Nuclear Engine for Rocket Vehicle Application) technology and the more advanced gas core reactors and show their potential advantages in reducing the initial mass in Earth orbit (IMEO) compared to advanced chemical rocket engines. Application of NERVA technology will require reestablishing the prior technological base or extending it to an advanced NERVA type engine, while the gas core NTR will require an extensive high risk research and development program. A technology intermediate between NERVA and the gas core NTR is a low pressure engine based on solid fuel, a Pressure Fed NTR (PFNTR). In addition to the simplicity of the gas pressurized engine cycle, the PFNTR takes advantage of the dissociation of hydrogen-the increases in specific impulse become significant as the chamber pressure decreases below 1.0 MPa (10 atmospheres) and the chamber temperature increases above 3000 K. The developmental status of technology applicable to a Pressure Fed Nuclear Thermal Rocket (PFNTR) lies between that of the NERVA engine and the gas core NTR (GCNTR). This document investigates PFNTR performance and provides typical mission analyses.
Author : Richard H. Cavicchi
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (31 download)
Download or read book Determination of Nuclear-rocket Power Levels for Unmanned Mars Vehicles Starting from Orbit about Earth written by Richard H. Cavicchi and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear rocket power levels for unmanned mars vehicles from earth orbit.
Author : David Buden
Publisher :
ISBN 13 : 9780974144337
Total Pages : 144 pages
Book Rating : 4.1/5 (443 download)
Download or read book Nuclear Thermal Propulsion Systems written by David Buden and published by . This book was released on 2011-07-01 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in rockets that use fission reactors as the heat source has centered on manned flights to Mars. The demands of such missions require rockets that are several times more powerful than the chemical rockets in use today.Rocket engines operate according to the basic principles expressed in Newton's third law of motion: for every action there is an equal and opposite reaction. In a chemical rocket, hot gases are created by chemical combustion; in a nuclear rocket heating of the propellant in a nuclear reactor creates hot gas. In either case, the hot gases flow through the throat of the rocket nozzle where they expand and develop thrust.Extensive development effort has been expended on nuclear rockets. The nuclear Rover/ NERVA rocket programs provide a very high confidence level that the technology for a flight nuclear rocket exists. These programs demonstrated power levels between 507 MWt and 4,100 MWt and thrust levels of up to 930 kN (200,000 Ibf). Specific impulse, a measure of rocket performance, was more than twice that of chemical rockets. Ground testing and technology development has been done on several concepts described in this book. However, though there appear to be no technical barriers to the development of a successful nuclear rocket, no nuclear rockets have been flown in space.This book describes the fundamentals of nuclear rockets, the safety and other mission requirements, developmental history of various concepts both in the U.S. and Russia, and it summarizes key developmental issues.
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (727 download)
Download or read book A Case for Mars written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now possible to make general comparisons of candidate propulsion systems for human exploration of Mars. Preliminary review indicates that the propulsion system most likely to meet all mission requirements is the Nuclear Thermal Rocket (NTR). Advanced cryogenic chemical propulsion systems achieve a maximum specific impulse (Isp) of about 470 seconds. The Nuclear Engine for Rocket Vehicle Application (NERVA) program of the 1960's built engines with Isp's of about 825 seconds. Performance of an NTR depends on achievable materials temperatures, but materials has progressed significantly since the 1960's. Also, some of the current research undertaken to improve chemical rocket performance, such as aerobraking or schemes to minify payload, applies to an NTR as well, although it is not essential. The NTR is reusable, and can be developed into a complete space transportation system. Only 3--4% of the nuclear fuel would be used in a Mars mission, and an engine can be used until about 40% of the fuel is expended. Nuclear thermal rockets can take mankind to the moon, to Mars, and beyond, but development must begin now. There is potential for orderly growth into nuclear concepts far beyond NERVA. Using chemical propulsion for lunar missions and delaying NTR development will only result in higher costs and delayed or cancelled Mars missions.
Author : David Hitchcock
Publisher : Lulu.com
ISBN 13 : 1435750322
Total Pages : 122 pages
Book Rating : 4.4/5 (357 download)
Download or read book Gas-Core Nuclear Rocket Design written by David Hitchcock and published by Lulu.com. This book was released on 2008-08-31 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Originally written in 1989, this book (Master's Thesis) reviews the state of the art in Gas-Core Nuclear Rocket design at the time of program termination in the 1970's, with updates for research performed during the 1980's. Major design problems are addressed and a proposal for an optimum design is included. This book may be especially appealing when one considers NASA's renewed mission to pioneer the future in space exploration.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722976330
Total Pages : 188 pages
Book Rating : 4.9/5 (763 download)
Download or read book Conceptual Studies on the Integration of a Nuclear Reactor System to a Manned Rover for Mars Missions written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiyear civilian manned missions to explore the surface of Mars are thought by NASA to be possible early in the next century. Expeditions to Mars, as well as permanent bases, are envisioned to require enhanced piloted vehicles to conduct science and exploration activities. Piloted rovers, with 30 kWe user net power (for drilling, sampling and sample analysis, onboard computer and computer instrumentation, vehicle thermal management, and astronaut life support systems) in addition to mobility are being considered. The rover design, for this study, included a four car train type vehicle complete with a hybrid solar photovoltaic/regenerative fuel cell auxiliary power system (APS). This system was designed to power the primary control vehicle. The APS supplies life support power for four astronauts and a limited degree of mobility allowing the primary control vehicle to limp back to either a permanent base or an accent vehicle. The results showed that the APS described above, with a mass of 667 kg, was sufficient to provide live support power and a top speed of five km/h for 6 hours per day. It was also seen that the factors that had the largest effect on the APS mass were the life support power, the number of astronauts, and the PV cell efficiency. The topics covered include: (1) power system options; (2) rover layout and design; (3) parametric analysis of total mass and power requirements for a manned Mars rover; (4) radiation shield design; and (5) energy conversion systems. El-Genk, Mohamed S. and Morley, Nicholas J. Unspecified Center MANNED MARS MISSIONS; MARS SURFACE; NUCLEAR POWER REACTORS; ROVING VEHICLES; SYSTEMS INTEGRATION; AUXILIARY POWER SOURCES; BRAYTON CYCLE; PHOTOVOLTAIC CELLS; RADIATION SHIELDING; REGENERATIVE FUEL CELLS; STIRLING ENGINES; THERMOELECTRIC POWER GENERATION...
Download or read book Ground Testing a Nuclear Thermal Rocket written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2008, the NASA Mars Architecture Team found that the Nuclear Thermal Rocket (NTR) was the preferred propulsion system out of all the combinations of chemical propulsion, solar electric, nuclear electric, aerobrake, and NTR studied. Recently, the National Research Council committee reviewing the NASA Technology Roadmaps recommended the NTR as one of the top 16 technologies that should be pursued by NASA. One of the main issues with developing a NTR for future missions is the ability to economically test the full system on the ground. In the late 1990s, the Sub-surface Active Filtering of Exhaust (SAFE) concept was first proposed by Howe as a method to test NTRs at full power and full duration. The concept relied on firing the NTR into one of the test holes at the Nevada Test Site which had been constructed to test nuclear weapons. In 2011, the cost of testing a NTR and the cost of performing a proof of concept experiment were evaluated.
Author : Benjamin Donahue
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Nuclear Thermal Propulsion Vehicle Design for the Mars Flyby with Surface Exploration Mission written by Benjamin Donahue and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanley K. Borowski
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (971 download)
Download or read book Conventional and Bimodal Nuclear Thermal Rocket (NTR) Artificial Gravity Mars Transfer Vehicle Concepts written by Stanley K. Borowski and published by . This book was released on 2016 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
