| 摘要 |
PURPOSE: A screw pipe for a residence time of a combustion gas is provided to steadily secure flame in an initial ignition. CONSTITUTION: A screw pipe for a residence time of a combustion gas comprises a combustion chamber(110), an igniter(120), a jet nozzle(140), and a sealing member(130). A combustion chamber comprises a propellant(111). The igniter is arranged inside the combustion chamber. The igniter ignites the propellant. The get nozzle discharges a propellant gas. The sealing member is arranged in the inner side of the get nozzle. The sealing member releases the constant after making the combustion gas staying inside the combustion chamber for a fixed time.
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