Experimental and Computational Study of n-Heptane Autoignition in a Direct-Injection Constant-Volume Combustion Chamber [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 006.6 Computer graphics
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2014
• Mô tả vật lý: Size: pp. 091510 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 255897
• Chủ đề: 1. 30 direct energy conversion; 2. Combustion; 3. Combustion chambers; 4. Emissions; 5. Et al; 6. Fuels; 7. Gas turbines; 8. Heat; 9. Heptane; 10. Ignition delay; 11. Pressure

Tóm tắt

The purpose of this study was to characterize experimental n-heptane combustion behavior in a direct-injection constant-volume combustion chamber (DI-CVCC), using chamber pressure to infer ignition delay and heat-release rate. Measurements generally displayed expected trends and indicated entirely premixed combustion with no mixing-controlled phase. A significant finding was the observation of negative temperature coefficient (NTC) behavior. Comparing results with CHEMKIN-PRO simulations, it was found that a homogeneous combustion model was reasonably accurate for ignition delays longer than 5 ms. The combination of NTC behavior and homogeneous fuel-air mixtures suggests that this DI-CVCC can be useful for validation of chemical-kinetic mechanisms.