{"project":{"acronym":"","projectId":8859,"title":"RotCFD: A Viscous Design Tool for Advanced Configurations","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":2,"currentTrl":4,"endTrl":4,"benefits":"Surka Helitek's software has been extensively used by US Helicopter manufacturers for analyzing new and existing designs. The proposed software enhancements will extend its usefulness and retain a global advantage.
The viscous extention and parallelization of RotCFD will find wide usage in NASA in addtion to the other branches of the armed services. The proposal offers a semi-automated viscous analysis tool that will lay the foundation for advanced designs in an economical way. Sukra Helitek's software are currently used for many advanced configurations at an early stage in the design and the addtion of viscous capability and parallelization will increase its usefulness and marketability.","description":"The incorporation of viscous analysis in design is vital for a complete understanding of aerodynamic problems. This proposal offers to develop and integrate with RotCFD a method for semi-automatically generating grids suitable for viscous analysis on complex configurations as well as parallelize the solver in RotCFD to take advantage of today's multi-core machines. The principle idea behind the semi-automation of the grid generation is to divide the geometry surface into patches and generate body-conforming grids from these patches. This partitioning allows for automatic generation of grids with aspect ratios suitable for viscous flows. Convection dominates the outer region, so unstructured Cartesian meshes can be generated quickly and easily here. The outer grid will be conformed to the inner grid so the entire grid can be treated as one unstructured grid with an unstructured solver, or as a hybrid grid with multiple zones and solvers. In the hybrid approach, viscous solvers can be used for the inner zone while the faster inviscid solvers can be used in the far-field. In Phase I a proof-of-concept grid generator, and a conceptual methodology for solver parallelization will be developed and demonstrated to work with RotCFD the rotor aerodynamic design tool. In Phase II, the features of the grid generator and solver will be fully developed and expanded.","startYear":2011,"startMonth":2,"endYear":2011,"endMonth":9,"statusDescription":"Completed","principalInvestigators":[{"contactId":389072,"canUserEdit":false,"firstName":"R Ganesh","lastName":"Rajagopalan","fullName":"R Ganesh Rajagopalan","fullNameInverted":"Rajagopalan, R Ganesh","primaryEmail":"nappi@sukra-helitek.com","publicEmail":true,"nacontact":false},{"contactId":3164505,"canUserEdit":false,"firstName":"ANDREW","lastName":"HOLLINGSWORTH","fullName":"Andrew Hollingsworth","fullNameInverted":"HOLLINGSWORTH, Andrew","primaryEmail":"nappi@sukra-helitek.com","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":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},{"contactId":168173,"canUserEdit":false,"firstName":"Gloria","lastName":"Yamauchi","fullName":"Gloria K Yamauchi","fullNameInverted":"Yamauchi, Gloria K","middleInitial":"K","primaryEmail":"gloria.k.yamauchi@nasa.gov","publicEmail":true,"nacontact":false}],"coInvestigators":[{"contactId":21579,"canUserEdit":false,"firstName":"Andrew","lastName":"Hollingsworth","fullName":"Andrew Hollingsworth","fullNameInverted":"Hollingsworth, Andrew","publicEmail":true,"nacontact":false}],"website":"","libraryItems":[],"transitions":[{"transitionId":68444,"projectId":8859,"transitionDate":"2011-09-01","path":"Closed Out","closeoutDocuments":[{"title":"Final Summary Chart","file":{"fileExtension":"pdf","fileId":307505,"fileName":"SBIR_2010_1_FSC_A2.09-8157","fileSize":224685,"objectId":68444,"objectType":{"lkuCodeId":1841,"code":"TRANSITION_FILES","description":"Transition Files","lkuCodeTypeId":182,"lkuCodeType":{"codeType":"OBJECT_TYPE","description":"Object Type"}},"fileSizeString":"219.4 KB"},"transitionId":68444,"fileId":307505}],"infoText":"Closed out","infoTextExtra":"","dateText":"September 2011"},{"transitionId":68445,"projectId":8859,"partner":"Other","transitionDate":"2012-04-01","path":"Advanced To","relatedProjectId":9375,"relatedProject":{"acronym":"","projectId":9375,"title":"RotCFD: A Viscous Design Tool for Advanced Configurations","startTrl":2,"currentTrl":5,"endTrl":5,"benefits":"NASA's interest in civil rotorcraft research prompts for a computational tool which has an Integrated Design Environment that is easy to learn and be robust and computationally efficient. The proposed design tool accomplishes this goal, especially in areas where geometric design changes are being considered and wind tunnel testing is integral to the design study. The tool can be effectively used for rotorcraft and V/STOL aircrafts where quantification of parametric variation in the design is essential for success.
The integrated Design Environment with a simple module for geometry manipulation and tools for pre-processing and post-processing CFD simulation will be an asset to any organization with a need to analyze a rotorcraft design or develop a new design. Incidentally the tool acting as a computational wind tunnel will be an asset to other government agencies including ARMY, NAVY and AIR FORCE where wind tunnel testing of rotorcraft and V/STOL aircrafts is routine. In the rotorcraft industry, the proposed tool can be used to assist during the design process. The tool will be designed to be versatile and enable the user to easily vary design parameters. In the educational institution the tool will help the students to gain insight on different flow phenomena, the effect of geometric variation and wind tunnel walls on the flow and the performance of a rotorcraft.","description":"During initial design studies, parametric variation of vehicle geometry is routine. In addition, rotorcraft engineers traditionally use the wind tunnel to evaluate and finalize designs. Correlation between wind tunnel results and flight tests, when not good, have been often attributed in part to uncertainty in blockage corrections. Estimation of rotor blockage is significantly more complex than bluff body corrections as the correction depends on operational characteristics such as rotor RPM and thrust produced. This proposal offers to develop an Integrated Design Environment (IDE) which can simulate a complete rotorcraft with or without wind tunnel walls including all the facility effects. At the heart of the innovation are: 1. An automated hybrid grid generator. (viscous grids near the bodies and unstructured Cartesian grid everywhere else) 2. A robust and economical incompressible flow solver for the entire system of grids. 3. Momentum source based rotor model that is suitable and economical for simulating configurations with multiple rotors. In Phase I, the proof-of-concept developed used unstructured Cartesian grid for the model and wind tunnel. In phase II, the tool will be extended to hybrid grid with viscous grid near solid surfaces and will include several tools including a simple CAD like geometry manipulation tool and pre- and post-processing tools all integrated in one environment to facilitate ease of use.","startYear":2012,"startMonth":4,"endYear":2014,"endMonth":4,"statusDescription":"Completed","website":"","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
","programId":73,"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"},"responsibleMdId":4875,"stockImageFileId":36648,"title":"Small Business Innovation Research/Small Business Tech Transfer"},"lastUpdated":"2024-1-10","releaseStatusString":"Released","viewCount":461,"endDateString":"Apr 2014","startDateString":"Apr 2012"},"infoText":"Advanced within the program","infoTextExtra":"Another project within the program (RotCFD: A Viscous Design Tool for Advanced Configurations)","dateText":"April 2012"}],"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
","programId":73,"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"},"responsibleMdId":4875,"stockImageFileId":36648,"title":"Small Business Innovation Research/Small Business Tech Transfer"},"leadOrganization":{"canUserEdit":false,"city":"Ames","congressionalDistrict":"Iowa 04","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":true,"linkCount":0,"organizationId":3633,"organizationName":"Sukra Helitek Inc.","organizationType":"Industry","stateTerritory":{"abbreviation":"IA","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Iowa","stateTerritoryId":57},"stateTerritoryId":57,"msiData":{},"setAsideData":["Women-Owned Small Business (WOSB)"],"ein":"810802216 ","uei":"NG59DUUYTJT5","naorganization":false,"organizationTypePretty":"Industry"},"supportingOrganizations":[{"acronym":"ARC","canUserEdit":false,"city":"Moffett Field","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":false,"linkCount":0,"organizationId":4941,"organizationName":"Ames Research Center","organizationType":"NASA_Center","stateTerritory":{"abbreviation":"CA","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"California","stateTerritoryId":59},"stateTerritoryId":59,"naorganization":false,"organizationTypePretty":"NASA Center"}],"statesWithWork":[{"abbreviation":"CA","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"California","stateTerritoryId":59},{"abbreviation":"IA","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Iowa","stateTerritoryId":57}],"lastUpdated":"2024-1-10","releaseStatusString":"Released","viewCount":556,"endDateString":"Sep 2011","startDateString":"Feb 2011"}}