Localization, Characterization, and Modeling of Freestream Disturbances in Hypersonic Wind Tunnels — Department of Defense funding opportunity
Department of Defense · Federal agency

Localization, Characterization, and Modeling of Freestream Disturbances in Hypersonic Wind Tunnels

Topic Funding Opportunities Back to Funding Opportunities Search Modeling of Freestream Disturbances in Hypersonic Wind Tunnels Funding Agency DOW DARPA Year: 2026 Topic Number: DPA26TZ06-DV006 Solicitation Number: 26.TZ...

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Deadline 6 days ago Location Alabama Type grant Level Federal Closed posted Sep 23, 2026
✦ AI Summary
  • Who can apply: small business, research institution, university.
  • Next deadline: October 21, 2026.
  • Issued by: Department of Defense.
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The “key facts” mode pulls structured fields directly from the official source posting (amount, deadline, eligibility tags). The AI mode adds a short plain-English narrative on top, generated from the same source. Always verify with the agency before applying.

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Who can apply — at a glance

  • Eligible applicants: see the Eligibility tab for the criteria from the official announcement.
  • Where: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, District of Columbia.
  • Award: amount not specified by the source.
  • Matching funds: not required.
  • Deadline type: Fixed.

Compiled from the official listing's structured fields — always verify with the funder before applying.

About the funder

Department of Defense is a federal-level funder.

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Deadline
6 days ago
Oct 21, 2026

About this opportunity

Topic Funding Opportunities Back to Funding Opportunities Search Modeling of Freestream Disturbances in Hypersonic Wind Tunnels Funding Agency DOW DARPA Year: 2026 Topic Number: DPA26TZ06-DV006 Solicitation Number: 26.TZ Tagged as: STTR BOTH Solicitation Status: Open NOTE: The Solicitations and topics listed on this site are copies from the various SBIR agency solicitations and are not necessarily the latest and most up-to-date. For this reason, you should use the agency link listed below which will take you directly to the appropriate agency server where you can read the official version of this solicitation and download the appropriate forms and rules. View Official Solicitation Release Schedule Release Date September 2, 2026 Open Date September 23, 2026 Due Date(s) October 21, 2026 Close Date October 21, 2026 Description Hypersonic ground-test facilities are critical for evaluating aerodynamic forces, aerothermodynamic heating, and boundary-layer transition (BLT) behavior on high-speed flight vehicles. However, conventional hypersonic wind tunnels are plagued by high-intensity freestream noise present in the test section. Because these disturbances propagate downstream, the fundamental understanding of their evolution may require a potentially deep analysis within the upstream components of the facility. Historically, Laufer established that nozzle-wall turbulent boundary layers radiate downstream-directed Mach waves, making them a principal source of freestream noise. However, especially in high-enthalpy and hypervelocity impulse facilities, the noise field may be further enhanced by complex upstream dynamics that are not optically accessible. Examples of focus areas include, but are not limited to: • Nozzle Throats and Walls (all tunnels): The extreme thermal and velocity gradients in the nozzle throat pose an opportunity for disturbance generation and initiation of turbulence over the nozzle walls. However, severe restricted throat geometry and high heat flux make optical diagnostic access virtually impossible. Diagnostics on tunnel walls are also very challenging although there are examples of previous successful attempts [12]. • Reflected-Shock Tunnels: Reservoir entropy, pressure fluctuations, and driver-gas contamination originate from the complex interaction between the reflected shock wave and the shock tube wall boundary layer [5, 6]. Furthermore, upstream diaphragm particulate-laden flow acts as a continuous source of premature model transition downstream. • Expansion Tubes and Tunnels: Subject to driver-gas acoustic focusing upstream driver unsteadiness is focused directly into the test gas when sound speed ratios fall into unfavorable ranges. This is exacerbated by secondary diaphragm rupture wave systems [3, 11] propagating from upstream.

Funding agency

Department of Defense
Federal agency

Tags

Nonprofit & Community Small Business Technology & Software Education & Research Construction & Housing Climate & Environment Transportation & Logistics Science, Tech & Engineering (STEM) sttr SBIR/STTR
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Who can apply

Small Business Technology Transfer (STTR) eligibility: applicant must be a small business concern (<= 500 employees) partnered with a non-profit research institution (university or federally-funded R&D center). Small business performs at least 40% of the work; research institution performs at least 30%. | eligibility Apply Find Topics and Solicitations Frequently Asked Questions (FAQ) Lab to Market Hub Program Tutorials Community Stay connected with our innovation ecosystem Community Event Spotlight News and Events Newsletter Sign-up Federal and State Technology (FAST) Growth Accelerator Fund Competition (GAFC) Topic Funding Opportunities Back to Funding Opportunities Search Modeling of Freestream Disturbances in Hypersonic Wind Tunnels Funding Agency DOW DARPA Year: 2026 Topic Number: DPA26TZ06-DV006 Solicitation Number: 26.TZ Tagged as: STTR BOTH Solicitation Status: Open NOTE: The Solicitations and topics listed on this site are copies from the various SBIR agency solicitations and are not necessarily the latest and most up-to-date. For this reason, yo

Geographic eligibility

  • Alabama
  • Alaska
  • Arizona
  • Arkansas
  • California
  • Colorado
  • Connecticut
  • Delaware
  • Florida
  • Georgia
  • Hawaii
  • Idaho
  • Illinois
  • Indiana
  • Iowa
  • Kansas
  • Kentucky
  • Louisiana
  • Maine
  • Maryland
  • Massachusetts
  • Michigan
  • Minnesota
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  • Missouri
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  • Nevada
  • New Hampshire
  • New Jersey
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  • New York
  • North Carolina
  • North Dakota
  • Ohio
  • Oklahoma
  • Oregon
  • Pennsylvania
  • Rhode Island
  • South Carolina
  • South Dakota
  • Tennessee
  • Texas
  • Utah
  • Vermont
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  • Washington
  • West Virginia
  • Wisconsin
  • Wyoming
  • District of Columbia

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Citation details

Source systemsbir-gov-sttr
Source IDDPA26TZ06-DV006-13002
PostedSep 23, 2026

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