Download or read book Aeroelastic Analysis and Testing of Supersonic Inflatable Aerodynamic Decelerators written by Christopher Lee Tanner and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The current limits of supersonic parachute technology may constrain the ability to safely land future robotic assets on the surface of Mars. This constraint has led to a renewed interest in supersonic inflatable aerodynamic decelerator (IAD) technology, which offers performance advantages over the DGB parachute. Two supersonic IAD designs of interest include the isotensoid and tension cone, named for their respective formative structural theories. Although these concepts have been the subject of various tests and analyses in the 1960s, 1970s, and 2000s, significant work remains to advance supersonic IADs to a technology readiness level that will enable their use on future flight missions. In particular, a review of the literature revealed a deficiency in adequate aerodynamic and aeroelastic data for these two IAD configurations at transonic and subsonic speeds. The first portion of this research amended this deficiency by testing flexible IAD articles at relevant transonic and subsonic conditions. The data obtained from these tests showed that the tension cone has superior drag performance with respect to the isotensoid, but that the isotensoid may demonstrate more favorable aeroelastic qualities than the tension cone. Additionally, despite the best efforts in test article design, there remains ambiguity regarding the accuracy of the observed subscale behavior for flight scale IADs. Due to the expense and complexity of large-scale testing, computational fluid-structure interaction (FSI) analyses will play an increasingly significant role in qualifying flight scale IADs for mission readiness. The second portion of this research involved the verification and validation of finite element analysis (FEA) and computational fluid dynamic (CFD) codes for use within an FSI framework. These verification and validation exercises lend credence to subsequent coupled FSI analyses involving more complex geometries and models. The third portion of this research used this FSI framework to predict the static aeroelastic response of a tension cone IAD in supersonic flow. Computational models were constructed to mimic the wind tunnel test articles and flow conditions. Converged FSI responses computed for the tension cone agreed reasonably well with wind tunnel data when orthotropic material models were used and indicated that current material models may require unrealistic input parameters in order to recover realistic deformations. These FSI analyses are among the first results published that present an extensive comparison between FSI computational models and wind tunnel data for a supersonic IAD.

Download or read book Aerodynamic Design Analysis and Validation of a Supersonic Inflatable Decelerator written by Ian Gauld Clark and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of supersonic wind tunnel tests conducted at the NASA Glenn and Langley Research Centers tested both rigid and flexible tension cone models. Testing of rigid force and moment models and pressure models demonstrated the new design to have favorable performance including drag coefficients between 1.4 and 1.5 and static stability at angles of attack from 0o. to 20o. A separate round of tests conducted on flexible tension cone models showed the system to be free of aeroelastic instability. Deployment tests conducted on an inflatable model demonstrated rapid, stable inflation in a supersonic environment. Structural modifications incorporated on the models were seen to reduce inflation pressure requirements by a factor of nearly two. Through this test program, this new tension cone IAD design was shown to be a credible option for a future flight system. Validation of CFD analyses for predicting aerodynamic IAD performance was also completed and the results are presented. Inviscid CFD analyses are seen to provide drag predictions accurate to within 6%. Viscous analyses performed show excellent agreement with measured pressure distributions and flow field characteristics. Comparisons between laminar and turbulent solutions indicate the likelihood of a turbulent boundary layer at high supersonic Mach numbers and large angles of attack.

Download or read book Comparison of Analysis with Test for Static Loading of Two Hypersonic Inflatable Aerodynamic Decelerator Concepts written by Karen H. Lyle and published by . This book was released on 2015 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hypersonic Inflatable Aerodynamic Decelerator HIAD Torus Mechanical Testing written by Tony Chen and published by . This book was released on 2017 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Static Longitudinal Aerodynamic Characteristics of Some Supersonic Decelerator Models at Mach Numbers of 2 30 and 4 63 written by Edwin E. Davenport and published by . This book was released on 1969 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hypersonic Inflatable Aerodynamic Decelerator Hiad Technology Development Overview written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-23 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The successful flight of the Inflatable Reentry Vehicle Experiment (IRVE)-3 has further demonstrated the potential value of Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology. This technology development effort is funded by NASA's Space Technology Mission Directorate (STMD) Game Changing Development Program (GCDP). This paper provides an overview of a multi-year HIAD technology development effort, detailing the projects completed to date and the additional testing planned for the future. Hughes, Stephen J. and Cheatwood, F. McNeil and Calomino, Anthony M. and Wright, Henry S. and Wusk, Mary E. and Hughes, Monica F. Ames Research Center; Langley Research Center NF1676L-16795

Download or read book Supersonic Aeroelastic Effects on Static Stability and Control Aeroelastic interaction by V W Donato written by Bell Aircraft Corporation and published by . This book was released on 1958 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A System for Aerodynamic Design and Analysis of Supersonic Aircraft Part 4 Test Cases written by W. D. Middleton and published by . This book was released on 1980 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary structural sensitivity study of hypersonic inflatable aerodynamic decelerator using probabilistic methods written by Karen H. Lyle and published by . This book was released on 2014 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A System for Aerodynamic Design and Analysis of Supersonic Aircraft written by and published by . This book was released on 1980 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A System for Aerodynamic Design and Analysis of Supersonic Aircraft Test cases written by and published by . This book was released on 1980 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deployment and Performance Characteristics of 1 5 meter Supersonic Attached Inflatable Decelerators written by Herman L. Bohon and published by . This book was released on 1974 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aero propulso elastic Analysis of a Supersonic Transport written by Joseph W. Connolly and published by . This book was released on 2018 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this dissertation is to develop a modeling methodology of a nonlinear dynamic propulsion system and its integration with a computational fluid dynamics tool suitable for aeroelastic studies. A sensitivity study is conducted to investigate the vehicle structural response and propulsion system performance. The new modeling capability expands typical computational fluid dynamics based aeroelastic analysis by adding a nonlinear dynamic model of the turbomachinery that is capable of capturing relevant gas dynamics. An example case of the aero-propulso-elastic (APE) modeling capability is explored for a supersonic transport with turbofan engines. The propulsion system is composed of an external compression inlet, variable cycle turbofan engine, and convergent-divergent nozzle, where each component model uses a computational fluid dynamics approach to capture the dominant dynamics. The turbomachinery is modeled using a volume dynamics approach, where the focus is on one-dimensional computational analysis. The internal ducts of the inlet and nozzle are modeled with a quasi-one-dimensional MacCormack method. Each individual propulsion component model is compared against independently developed higher fidelity modeling methods and experimental test data, where available. The individual component models are then integrated into an overall simple propulsion system model. This allows for dynamic analysis, control design studies, and for a comparative verification of the turbomachinery model integrated with the higher fidelity three-dimensional computational model required for APE analysis. An overview of the methodology for integrating the propulsion system and elastic vehicle is provided. This is followed by a sensitivity study to explore coupling sensitivities compared against typical aeroelastic analysis. Dynamic and static vehicle responses are considered across key flight conditions and vehicle-level angles of attack, where the inclusion of the propulsion system has a 10% increase in vehicle wing tip deformations. It is found that the propulsion system is stable at various operating conditions, with structural oscillations having little impact on propulsion system performance. Perceived loudness, a key performance metric for a supersonic transport, is investigated using the APE model. APE results lead to an approximately 4 dB increase in noise over a rigid body analysis that neglects the propulsion system. By including the propulsion system in the analysis, the greatest impacts are shown during off nominal conditions, indicating that this modeling capability provides a powerful tool for detailed analysis during maneuvers and off design conditions.

Download or read book Aeroelastic Analysis of Side Load in Supersonic Nozzles with Separated Flow written by L.-O. Pekkari and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A System for Aerodynamic Design and Analysis of Supersonic Aircraft Pt 4 Test Cases written by W.D. Middleton and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: