An annular fluid oscillator nozzle combustion chamber
The fuel is atomized by the Coanda effect in the annular fluid oscillator nozzle combustion chamber, solving the uneven atomization problem of the centrifugal nozzle at low flow rates, achieving more efficient combustion and lower exhaust emissions.
CN120332799BActive Publication Date: 2025-09-12NANCHANG HANGKONG UNIVERSITY
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Patent Information
- Application Number
- CN202510582680.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2045-05-07
AI Technical Summary
Technical Problem
Existing centrifugal nozzles have uneven fuel atomization at low flow rates, which affects combustion efficiency and fails to effectively improve the mixing degree of fuel and air.
Method used
The annular fluid oscillator nozzle combustion chamber uses the Coanda effect to generate periodic oscillations, atomizes the fuel through oscillating shearing action, and sprays a periodically changing fluid at the outlet expansion section to achieve uniform coverage of the fuel droplets.
Benefits of technology
It improves the combustion efficiency of the combustion chamber and the mixing degree of fuel and air, reduces exhaust emissions, expands the combustion range, and improves overall performance.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides an annular fluid oscillator nozzle combustion chamber, comprising an outer casing of a combustion chamber, a flame tube installed inside the outer casing of the combustion chamber, an annular oscillation generating device installed on the side of the flame tube, an inner casing of the combustion chamber installed inside the flame tube, an oil delivery device connected to the annular oscillation generating device, and a diffuser fixedly installed on the outer casing of the combustion chamber. The fuel of the present invention is accelerated through the cross-section of the inlet contraction section, flows through the cavity and the fluid separation device, and through the Coanda effect, the fuel in the cavity periodically flows into the reflux channel located around the cavity, and generates annular periodic disturbances on the fuel flowing into the cavity from the inlet convergence section of the annular fluid oscillation device, thereby causing the fuel to deviate axially and be ejected along the fluid deflection section to the outlet expansion section, realizing a large range of periodic directional changes. The speed direction of the periodic change of the fuel enables the fuel to be more fully mixed with the air, thereby improving the uniformity of the fuel atomization and making the fuel burn better.
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