High Temperature Propulsion System Structural Seals For Future Space Launch Vehicles
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High Temperature Propulsion System Structural Seals For Future Space Launch Vehicles
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-21
High Temperature Propulsion System Structural Seals For Future Space Launch Vehicles written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-21 with categories.
Durable, flexible sliding seals are required in advanced hypersonic engines to seal the perimeters of movable engine ramps for efficient, safe operation in high heat flux environments at temperatures of 2000 to 2500 F. Current seal designs do not meet the demanding requirements for future engines, so NASA s Glenn Research Center is developing advanced seals and preloading devices to overcome these shortfalls. An advanced ceramic wafer seal design and two types of seal preloading devices were evaluated in a series of compression, scrub, and flow tests. Silicon nitride wafer seals survived 2000 in. 1000 cycles) of scrubbing at 1600 F against an Inconel 625 rub surface with no chips or signs of damage. Flow rates measured for the wafers before and after scrubbing were almost identical and were up to 32 times lower than those recorded for the best braided rope seal flow blockers. Canted coil springs and silicon nitride compression springs showed promise conceptually as potential seal preloading devices to help maintain seal resiliency. A finite element model of the canted coil spring revealed that it should be possible to produce a spring out of high temperature materials for applications at 2000+ F. Dunlap, Patrick H., Jr. and Steinetz, Bruce M. and DeMange, Jeffrey J. Glenn Research Center NASA/TM-2004-212907, E-14304
Advanced High Temperature Structural Seals
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-09-27
Advanced High Temperature Structural Seals written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-27 with Science categories.
This program addresses the development of high temperature structural seals for control surfaces for a new generation of small reusable launch vehicles. Successful development will contribute significantly to the mission goal of reducing launch cost for small, 200 to 300 lb payloads. Development of high temperature seals is mission enabling. For instance, ineffective control surface seals can result in high temperature (3100 F) flows in the elevon area exceeding structural material limits. Longer sealing life will allow use for many missions before replacement, contributing to the reduction of hardware, operation and launch costs. During the first phase of this program the existing launch vehicle control surface sealing concepts were reviewed, the aerothermal environment for a high temperature seal design was analyzed and a mock up of an arc-jet test fixture for evaluating seal concepts was fabricated. Newquist, Charles W. and Verzemnieks, Juris and Keller, Peter C. and Shorey, Mark W. and Steinetz, Bruce (Technical Monitor) Glenn Research Center NASA/CR-2000-210522, E-12489, NAS 1.26:210522
Modeling And Evaluation Of Canted Coil Springs As High Temperature Seal Preloading Devices
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-21
Modeling And Evaluation Of Canted Coil Springs As High Temperature Seal Preloading Devices written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-21 with categories.
Future reusable launch vehicles will require advanced structural seals. This includes propulsion seals along edges and hinge lines in hypersonic engines, and control surface seals for movable flaps and elevons on proposed reentry vehicles. Seals must remain in sealing engagement with opposing surfaces, for multiple missions, even though the seal gap may be opening and closing due to thermal and structural loads. To meet this requirement either the seals themselves must be resilient or there must be a resilient structural element behind the seals. Case Western Reserve University is working with NASA s Glenn Research Center to develop more resilient high temperature seal components and preloading devices. Results are presented for a finite element analysis of a canted coil spring that is being considered as a high temperature seal preloading device. This type of spring is a leading candidate due to its ability to provide nearly constant force over a large deflection. The finite element analyses were verified by comparing them to experimental results of canted coil springs of three different stiffnesses, measured at Glenn Research Center. Once validated the parameterized model was combined with a scripting algorithm to assess the effects of key spring design variables (wire diameter, coils per inch, cant amplitude, eccentricity, and spring width) on spring stiffness and maximum Von Mises stress to aid in subsequent design. Oswald, Jay J. and Mullen, Robert L. and Dunlap, Patrick H., Jr. and Steinetz, Bruce M. Glenn Research Center NASA/TM-2004-213189, E-14688, AIAA Paper 2004-3889
Maintaining U S Leadership In Aeronautics
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Author : Committee to Identify Potential Breakthrough Technologies and Assess Long-Term R&D Goals in Aeronautics and Space Transportation Technology
language : en
Publisher: National Academies Press
Release Date : 1998-10-21
Maintaining U S Leadership In Aeronautics written by Committee to Identify Potential Breakthrough Technologies and Assess Long-Term R&D Goals in Aeronautics and Space Transportation Technology and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-10-21 with Science categories.
After the completion of the National Research Council (NRC) report, Maintaining U.S. Leadership in Aeronautics: Scenario-Based Strategic Planning for NASA's Aeronautics Enterprise (1997), the National Aeronautics and Space Administration (NASA) Office of Aeronautics and Space Transportation Technology requested that the NRC remain involved in its strategic planning process by conducting a study to identify a short list of revolutionary or breakthrough technologies that could be critical to the 20 to 25 year future of aeronautics and space transportation. These technologies were to address the areas of need and opportunity identified in the above mentioned NRC report, which have been characterized by NASA's 10 goals (see Box ES-1) in "Aeronautics & Space Transportation Technology: Three Pillars for Success" (NASA, 1997). The present study would also examine the 10 goals to determine if they are likely to be achievable, either through evolutionary steps in technology or through the identification and application of breakthrough ideas, concepts, and technologies.
41st Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 4150 05 4199
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Author :
language : en
Publisher:
Release Date : 2005
41st Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 4150 05 4199 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Airplanes categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Large Space Structures Systems In The Space Station Era
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Author :
language : en
Publisher:
Release Date : 1990
Large Space Structures Systems In The Space Station Era written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Large space structures (Astronautics) categories.
Proceedings Of The 2022 International Conference On Smart Manufacturing And Material Processing Smmp2022
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Author : A. Nayyar
language : en
Publisher: IOS Press
Release Date : 2022-11-29
Proceedings Of The 2022 International Conference On Smart Manufacturing And Material Processing Smmp2022 written by A. Nayyar and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-29 with Technology & Engineering categories.
Smart manufacturing is a broad category of manufacturing that employs computer-integration, high levels of adaptability and rapid design changes, together with digital information technology and a technically-trained workforce. This book presents the proceedings of SMMP2022, the 2022 International Conference on Smart Manufacturing and Material Processing, held on 12 and 13 August 2022 as a virtual event due to continuing restrictions related to the COVID-19 pandemic, and hosted from Shanghai, China. The conference provides a platform for researchers and scientists from smart manufacturing and material sciences to come together with researchers from various other application areas to discuss problems and solutions, identify new issues, and shape future directions for research. The conference received 60 submissions. These were submitted to a rigorous peer review process by a committee of experts from various disciplines, after which, 23 were accepted for presentation at the conference and publication here. The topics covered include materials processing and product manufacture, sensors and smart material systems, functional materials, industrial automation and process control, and discussion of the state-of-the-art and future direction of smart manufacturing and material sciences. Providing an overview of current developments in smart manufacturing and material processing, the book will be of interest to all those working in the field.
Hearings Reports And Prints Of The Senate Select Committee On Small Business
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Author : United States. Congress. Senate. Select Committee on Small Business
language : en
Publisher:
Release Date : 1975
Hearings Reports And Prints Of The Senate Select Committee On Small Business written by United States. Congress. Senate. Select Committee on Small Business and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Legislative hearings categories.
Technology And Management Assistance Programs Of The Small Business Administration
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Author : United States. Congress. Senate. Select Committee on Small Business
language : en
Publisher:
Release Date : 1976
Technology And Management Assistance Programs Of The Small Business Administration written by United States. Congress. Senate. Select Committee on Small Business and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Government publications categories.