A ring hydrogen combustion chamber with guide vanes and triangular nozzles
By introducing guide vanes and a triangular nozzle array into the annular combustion chamber, the technical problem caused by uneven mixing under hydrogen combustion conditions was solved, resulting in higher combustion stability and longer service life, and reduced NOx emissions.
CN122408076APending Publication Date: 2026-07-17NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing annular combustors, under hydrogen combustion conditions, suffer from uneven mixing, resulting in localized high-temperature hot spots and excessive NOx emissions. Furthermore, airflow separation in the pre-diffuser section leads to combustion instability and shortened lifespan.
Method used
The annular hydrogen combustion chamber design employs guide vanes and a triangular nozzle array. The guide vanes suppress airflow separation, the triangular nozzles enable cross-mixing of air and fuel, and the cooling holes optimize airflow and temperature distribution.
Benefits of technology
It significantly improves fuel blending uniformity, reduces peak combustion temperature, reduces NOx emissions, and enhances combustion stability and service life.
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Smart Images
Figure CN122408076A_ABST
Abstract
The application discloses a hydrogen-fueled annular combustion chamber with guide vanes and triangular nozzles, which comprises a flame tube and a micro-mixing nozzle assembly. The flame tube is composed of an outer wall and an inner wall, and an inner cavity is formed between the outer wall and the inner wall, in which air flows in an axial direction and fuel gas flows in a radial direction. Guide vanes are arranged in a pre-expansion section at the front end of the flame tube. Cooling holes are arranged on the inner wall of the flame tube. The micro-mixing nozzle assembly is composed of a group of triangular nozzles arranged in a petal shape and installed on the front part of the inner wall of the flame tube. Fuel is introduced into the triangular nozzles through fuel inlets on the outer wall of the flame tube, and cross mixing with air flowing in the axial direction is realized. The application ensures accurate air flow distribution by adding guide vanes. The triangular nozzles increase the uniformity of the micro-mixing nozzle, realize efficient cross mixing of air axial flow and fuel radial flow, make hydrogen combustion more uniform, and effectively reduce nitrogen oxide emissions.
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