Design and Optimization of Combustion Chamber Performance of Downhole Steam Generator
This paper adopts numerical simulation method,selects diesel as fuel,and optimizes the design of the combustion chamber of the downhole steam generator,with a working pressure of 21 MPa.The re-sults show that as the swirling angle of the air increases,the uniformity of the combustion chamber outlet temperature and combustion efficiency gradually decrease.The high-temperature jet formed by the pre-combustion chamber constriction structure is conducive to improving the stability of the flame.The changes in the diameter of the pre-combustion chamber inlet and the contraction diameter directly affect the gas flow rate and the length of the high-temperature jet in the pre-combustion chamber.When the diameter of the inlet is greater than 6 mm,the combustion inside the pre-combustion chamber deterio-rates and the flame spreads towards the air chamber.The stepped wall structure obstructs the airflow and helps the flame stay upstream of the combustion chamber.
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