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01:23Steady, Laminar Flow in Circular Tubes
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01:17Steady, Laminar Flow Between Parallel Plates
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01:16Bernoulli's Equation for Flow Normal to a Streamline
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01:30Bernoulli's Equation for Flow Along a Streamline
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01:27Laminar Flow
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Control of flow deflection angle around the corner using microjet array.
Yuto Nakadori1, Satoshi Yuura1, Takahiro Kagawa1
1Department of Advanced Science and Technology, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-Ku, Nagoya, Aichi, 468-8511, Japan.
Scientific Reports
|January 6, 2025
Summary
A novel microjet array technique actively controls airflow around corners. This method precisely adjusts flow deflection by manipulating vortex dynamics, offering precise control over aerodynamic behavior.
Area of Science:
- Fluid dynamics
- Aerodynamics
- Flow control
Background:
- Controlling airflow around corners is crucial in various engineering applications.
- Traditional methods often lack precision and efficiency.
Purpose of the Study:
- To introduce a new active flow control technique using a microjet array.
- To identify key parameters influencing flow deflection angle around a corner.
Main Methods:
- Utilized a microjet array to inject jets from a downstream-facing step.
- Employed Particle Image Velocimetry (PIV) to measure flow velocities.
- Introduced a momentum coefficient for data reduction.
Main Results:
- Microjet injection generates a vortex, pulling the flow downwards.
- Flow deflection angle increases with supply pressure (jet Mach number).
- A linear relationship was found between momentum coefficient and streamline slope.
Conclusions:
- The microjet array provides effective active control of flow deflection.
- The momentum coefficient parameter enables precise, speed-independent control of flow deflection.
- This technique offers precise aerodynamic control for corner flows.