{"project":{"acronym":"","projectId":9120,"title":"A High Order Accuracy Computational Tool for Unsteady Turbulent Flows and Acoustics","primaryTaxonomyNodes":[{"taxonomyNodeId":10949,"taxonomyRootId":8816,"parentNodeId":10946,"level":3,"code":"TX15.1.3","title":"Aeroelasticity","definition":"Aeroelasticity is the coupled interaction of vehicle aerodynamics with vehicle structures and control systems, including static aeroelastic deformation, flutter, buffet, control surface buzz, aeroservoelasticity, and limit cycle oscillations.","exampleTechnologies":"Computational aeroelastic tools coupling Computational Fluid Dynamics (CFD) with structural dynamics methodologies to predict flutter, buffet, limit cycle oscillations and aeroservoelastic interactions; advanced unsteady CFD techniques to predict nonlinear fluctuating pressure fields for launch vehicle and aircraft buffet, control surface buzz and other nonlinear aero structural interactions; advanced ground test techniques and strategies to simulate and predict the performance of coupled aero/structural systems as well as complex unsteady flows and loads; advanced aircraft systems such as truss-braced wing and other concepts based on high aspect ratio wing configurations enabled by advanced static and dynamic aeroelastic prediction methodology; active flutter suppression; aeroelastic tailoring; active static/buffet/gust load alleviation","hasChildren":false,"hasInteriorContent":true}],"startTrl":1,"currentTrl":5,"endTrl":5,"benefits":"Similar to NASA, the aerospace industry is in urgent need for such accurate tools that can handle unsteady turbulent flow problems. Existing commercial codes have very low accuracy that one needs to use very large grids to resolve complex problems. With high order methods one can use much smaller grids to accurately capture complex physics such as turbulence and acoustics. This will allow small and large companies to refine their designs and come up with better products that can compete effectively in the market place. The computational tool is not limited to aerospace applications alone but will serve a large spectrum of industries.
The proposed new tool will allow NASA engineers to perform computations on any complex geometry and for flow regimes spanning the entire Mach number spectrum, from incompressible to the hypersonic regimes. An attractive feature of the new tool is the high order of accuracy of the numerical methods used. These methods are becoming necessary to resolve unsteady turbulent flows and especially acoustic radiation. The later problem is becoming the engineering challenge of the 21st century; i.e. noise source identification and control.","description":"The main objective of this research effort is to develop a higher order unsteady turbulent flow solver based on the FDV method, and to exploit its attributes of spanning the whole Mach number range. The well known advantages of the implicit FEM will be inherited along with robust boundary conditions implementation and sound mathematical bases. Efficient parallelization, using MPI through domain decomposition and EBE solution, and supporting unstructured grids will make this effort a long-term investment tool, since all these gained advantages are desirable in virtually every NASA aerodynamics application. To this end, modularization of the in-house developed computer code will be extended to support higher order elements, namely; quadratic, cubic, and eventually spectral elements. The developed higher order code will be tested at various flow conditions starting from the incompressible limit to high supersonics, and including subsonics and transonics.","startYear":2011,"startMonth":2,"endYear":2011,"endMonth":9,"statusDescription":"Completed","principalInvestigators":[{"contactId":257991,"canUserEdit":false,"firstName":"Kader","lastName":"Frendi","fullName":"Kader Frendi","fullNameInverted":"Frendi, Kader","primaryEmail":"kfrendi@knology.net","publicEmail":true,"nacontact":false}],"programDirectors":[{"contactId":206378,"canUserEdit":false,"firstName":"Jason","lastName":"Kessler","fullName":"Jason L Kessler","fullNameInverted":"Kessler, Jason L","middleInitial":"L","primaryEmail":"jason.l.kessler@nasa.gov","publicEmail":true,"nacontact":false}],"programExecutives":[{"contactId":215154,"canUserEdit":false,"firstName":"Jennifer","lastName":"Gustetic","fullName":"Jennifer L Gustetic","fullNameInverted":"Gustetic, Jennifer L","middleInitial":"L","primaryEmail":"jennifer.l.gustetic@nasa.gov","publicEmail":true,"nacontact":false}],"programManagers":[{"contactId":62051,"canUserEdit":false,"firstName":"Carlos","lastName":"Torrez","fullName":"Carlos Torrez","fullNameInverted":"Torrez, Carlos","primaryEmail":"carlos.torrez@nasa.gov","publicEmail":true,"nacontact":false}],"projectManagers":[{"contactId":83237,"canUserEdit":false,"firstName":"Chun","lastName":"Tang","fullName":"Chun Y Tang","fullNameInverted":"Tang, Chun Y","middleInitial":"Y","primaryEmail":"chun.y.tang@nasa.gov","publicEmail":true,"nacontact":false},{"contactId":461333,"canUserEdit":false,"firstName":"Theresa","lastName":"Stanley","fullName":"Theresa M Stanley","fullNameInverted":"Stanley, Theresa M","middleInitial":"M","primaryEmail":"theresa.m.stanley@nasa.gov","publicEmail":true,"nacontact":false}],"website":"","libraryItems":[],"transitions":[{"transitionId":67743,"projectId":9120,"transitionDate":"2011-09-01","path":"Closed Out","closeoutDocuments":[{"title":"Final Summary Chart","file":{"fileExtension":"ppt","fileId":307135,"fileName":"SBIR_2010_1_FSC_A2.06-8769","fileSize":134656,"objectId":67743,"objectType":{"lkuCodeId":1841,"code":"TRANSITION_FILES","description":"Transition Files","lkuCodeTypeId":182,"lkuCodeType":{"codeType":"OBJECT_TYPE","description":"Object Type"}},"fileSizeString":"131.5 KB"},"transitionId":67743,"fileId":307135}],"infoText":"Closed out","infoTextExtra":"","dateText":"September 2011"}],"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"program":{"acronym":"SBIR/STTR","active":true,"description":"
The NASA SBIR and STTR programs fund the research, development, and demonstration of innovative technologies that fulfill NASA needs as described in the annual Solicitations and have significant potential for successful commercialization. If you are a small business concern (SBC) with 500 or fewer employees or a non-profit RI such as a university or a research laboratory with ties to an SBC, then NASA encourages you to learn more about the SBIR and STTR programs as a potential source of seed funding for the development of your innovations.
The SBIR and STTR programs have 3 phases:
The SBIR and STTR Phase I contracts last for 6 months with a maximum funding of $125,000, and Phase II contracts last for 24 months with a maximum funding of $750,000 - $1.5 million.
Opportunity for Continued Technology Development Post-Phase II:
The NASA SBIR/STTR Program currently has in place two initiatives for supporting its small business partners past the basic Phase I and Phase II elements of the program that emphasize opportunities for commercialization. Specifically, the NASA SBIR/STTR Program has the Phase II Enhancement (Phase II-E) and Phase II eXpanded (Phase II-X) contract options.
Please review the links below to obtain more information on the SBIR/STTR programs.
Provides an overview of the SBIR and STTR programs as implemented by NASA
Provides access to the annual SBIR/STTR Solicitations containing detailed information on the program eligibility requirements, proposal instructions and research topics and subtopics
Schedule and links for the SBIR/STTR solicitations and selection announcements
Federal and non-Federal sources of assistance for small business
Search our complete archive of awarded project abstracts to learn about what NASA has funded
Still have questions? Visit the program FAQs
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