Pulsed and co-flow jet injection in 2026: overview
Pulsed and co-flow jet injection use fluidic actuation to influence a surrounding flow. Pulsed jets deliver intermittent bursts, while co-flow jets inject air along a surface to add momentum and strengthen circulation. Both approaches can delay flow separation, supporting lift and control without relying only on changes to an aircraft’s shape. Their central engineering trade-off is aerodynamic benefit against the energy, hardware and control demands of supplying the jet.
Recent work tests these methods across aircraft, wind energy and noise control. In September 2026, Parul University studied a modified discrete co-flow jet for wind turbines, while Northwestern Polytechnical University reported integrated optimization of airfoil shape and flow-control settings. In August 2026, researchers at the University of Nottingham and partners examined how pulsed-jet duty cycle shapes vortices on swept wings. Other recent directions include pulsed-jet flap experiments, plasma co-flow jets for dynamic stall, and co-flow jets to reduce separation-induced airfoil noise.
- 1Optimize together: Co-designing airfoil geometry and jet settings addresses a limitation of studies that optimize each separately.
- 2Broaden the use cases: Recent work extends co-flow jet research from aircraft airfoils to wind turbines, while pulsed jets are also being tested on engine nacelles.
- 3Control the energy cost: Intermittent pulsed blowing can avoid supplying flow continuously, but effective control still depends on actuator response and operating conditions.
Top organizations working on pulsed and co-flow jet injection
Ranked by Linknovate activity score · last 24 monthsThe activity score adds up the relevance of every patent, publication, grant and news item linking an organization to pulsed and co-flow jet injection. Showing 7 of 20 organizations.
| # | Organization | Approach | Signals (24 mo) | Momentum | Why it matters |
|---|---|---|---|---|---|
| 1 | 
Chalmers University of Technology
Research · Sweden |
Co-flow jets | PUB 3 | new | Researchers investigate co-flow jet active flow control on wingsail airfoils, using numerical studies to assess aerodynamic performance across wind angles and airfoil geometries. |
| 2 | 
University of Maine, United States
Research · United States |
Co-flow jets | PUB 3 | new | Researchers study co-flow jet active flow control for wingsails, assessing how it can improve aerodynamic performance at different apparent wind angles. |
| 3 | CJ
CoFlow Jet LLC
Corporate |
Co-flow jets | PUB 4 | new | Develops co-flow jet flow-control applications, including JetSail stationary wind sails and aircraft concepts designed for ultra-low-density Martian conditions. |
| 4 | 
Northwestern Polytechnical University
Research · China |
Co-flow jets | PUB 4 | new | Recently, researchers optimized aerodynamic shape and flow-control parameters for co-flow jet airfoils, alongside experimental and numerical studies of co-flow jets on swept wings. |
| 5 | PU
Parul University
Research · India |
Co-flow jets | PUB 4 | new | Recently, researchers evaluated a modified discrete co-flow jet configuration for wind turbine applications, building on work to optimize injection locations for flip co-flow jet control. |
| 6 | 
National Research Center < >
Research · Russia |
Co-flow jets | PUB 2 | new | Researchers use numerical simulations to examine how co-flow jet active flow control affects dynamic stall on oscillating airfoils at low Reynolds numbers. |
| 7 | 
M.S. Ramaiah Institute of Technology
Research · India |
Co-flow jets | PUB 2 | new | Researchers combine wind-tunnel testing and numerical analysis of co-flow jet airfoils, including optimization of injection-slot placement to improve aerodynamic efficiency while limiting energy use. |
| 8 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
| 9 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
| 10 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
Leading research centers
Leading research institutions 18 total
- Chalmers University of TechnologySwedenResearchers investigate co-flow jet active flow control on wingsail airfoils, using numerical studies to assess aerodynamic performance across wind angles and airfoil geometries.
- University of Maine, United StatesUnited StatesResearchers study co-flow jet active flow control for wingsails, assessing how it can improve aerodynamic performance at different apparent wind angles.
- Northwestern Polytechnical UniversityChinaRecently, researchers optimized aerodynamic shape and flow-control parameters for co-flow jet airfoils, alongside experimental and numerical studies of co-flow jets on swept wings.
- ··Hidden research institutionCountryAvailable to registered users, with their key researchers.
- ··Hidden research institutionCountryAvailable to registered users, with their key researchers.
Where pulsed and co-flow jet injection innovation happens
Share of documents with at least one organization from each country.
Open the interactive map with all 20 organizationsMain technical approaches
Last 24 months| Approach | What it is | Documents | Leading organizations |
|---|---|---|---|
| Pulsed blowing | Intermittent jets can reduce continuous fluid supply, but performance depends on timing, actuator response and the surrounding flow. | 7 |
Eastern Institute of Technology, Harbin Institute of Technology, TU Berlin |
| Co-flow jets | Jets injected along a surface can strengthen circulation and delay separation, but require integrated ducting and energy supply. | 32 |
Chalmers University of Technology, University of Maine, United States, Northwestern Polytechnical University |
| Steady blowing | Continuous injection offers sustained flow control, but consumes energy even when peak actuation is not needed. | 12 |
Chalmers University of Technology, University of Maine, United States, National Research Center < > |
| Synthetic jets | Zero-net-mass-flux actuators create flow motion without continuous mass addition, but their effect depends on actuator authority and placement. | 3 |
UniversityMiami, Harbin Institute of Technology, Georgia Southern University |
| Sweeping jets | A jet that moves across the surface can spread control across a wider area, but adds actuator and flow-management complexity. | 2 |
University of Alabama in Huntsville, U.S. Air force |
Emerging trends
Last 12 months vs previous 36 monthsTerms whose frequency in the last 12 months grew the most compared with the previous 36 months.
Funding and investment
Recent funding rounds
The funding data lists two rounds totaling $89,113,896 associated with the University of Nottingham, alongside $1,837,510 in grants across two awards since 2020. These are associated funding signals, not evidence that all funding was dedicated to jet injection.
Frequently asked questions about pulsed and co-flow jet injection
What companies are working on pulsed and co-flow jet injection?
The listed corporate players are CoFlow Jet LLC and Airbus Operations. CoFlow Jet LLC develops co-flow jet applications, including JetSail stationary wind sails and aircraft concepts for ultra-low-density Martian conditions. Airbus Operations is involved in active flow-control research for high-lift wings and pulsed-jet studies of vortex dynamics on swept wings.
Which universities and research centers lead pulsed and co-flow jet injection research?
Chalmers University of Technology, the University of Maine and Northwestern Polytechnical University are among the active research organizations. Chalmers and the University of Maine study co-flow jets for wingsails, while Northwestern Polytechnical University examines airfoil optimization and co-flow jets on swept wings. The University of Nottingham also studies pulsed-jet control on swept wings.
How much funding has pulsed and co-flow jet injection received?
The funding data lists $89,113,896 across two rounds associated with the University of Nottingham, plus $1,837,510 across two grants since 2020. These are funding records linked to organizations in the field, not confirmation that every dollar directly supports pulsed or co-flow jet injection. The available figures should therefore be treated as associated funding, not a dedicated technology total.
What were the latest pulsed and co-flow jet injection funding rounds?
The latest listed round is a $85,451,681 University of Nottingham expansion in March 2025. A University of Nottingham project and infrastructure financing round of $3,662,215 is listed for December 2024. The records do not establish that either round was dedicated specifically to pulsed or co-flow jet injection.
Is pulsed and co-flow jet injection patent activity growing?
No recent growth is shown: the data lists zero patents in the 24-month window. Three patents appear in the all-time document totals, but no patent holders are identified and no recent patent growth rate is available. Publications remain the more visible form of recorded activity, with 32 publications in the last year.
What are the latest developments in pulsed and co-flow jet injection?
Recent studies include a modified discrete co-flow jet for wind turbines from Parul University in September 2026 and integrated airfoil-shape and flow-control optimization from Northwestern Polytechnical University that month. In August 2026, the University of Nottingham and partners examined pulsed-jet duty-cycle effects on swept-wing vortex dynamics. Other work tests pulsed-jet flaps and plasma co-flow jets for dynamic stall.
What are the main approaches in pulsed and co-flow jet injection and how do they differ?
The five listed approaches are pulsed blowing, co-flow jets, steady blowing, synthetic jets and sweeping jets. Pulsed and steady blowing differ in whether injection is intermittent or continuous; co-flow jets direct flow along a surface. Synthetic jets create flow motion without net mass addition, while sweeping jets move the jet across a surface. Each approach trades control authority against energy and actuator demands.
Which countries lead pulsed and co-flow jet injection?
The United States leads the recorded country totals with 125 documents, followed by China with 84 and France with 41. Germany has 34, and the United Kingdom has 25. These figures indicate where related research and activity are recorded; they do not establish that every document reflects commercial development or jet-injection deployment.
What are the applications of pulsed and co-flow jet injection?
Airfoil stall control is the largest listed application, with 42 documents; wind energy has 10 and aircraft high lift has 16. Recent studies also examine co-flow jets for wind turbines, pulsed jets on a short-inlet engine nacelle, and noise reduction on an airfoil. Other documented application areas include turbomachinery.