초록 ▼

The engine for a rocket is suitable for using for an educational program. The engine uses a liquid phase propellant having a predetermined boiling point and a heating substance having a temperature higher than the boiling point. The engine has an inner wall having a circumferential surface; an outer

The engine for a rocket is suitable for using for an educational program. The engine uses a liquid phase propellant having a predetermined boiling point and a heating substance having a temperature higher than the boiling point. The engine has an inner wall having a circumferential surface; an outer wall surrounding the inner wall, the outer wall having an interior surface spaced from the circumferential surface of the inner wall by a predetermined distance such that the space between the circumferential surface and the interior surface form a mixing chamber having an opening; and injector for injecting the liquid-phase propellant and the heating substance into the mixing chamber so that the propellant is evaporated by the heating substance thereby creating a jet stream moving from the opening of the mixing chamber to the outside of the mixing chamber.

대표청구항 ▼

1. An engine using a nitrogen liquid phase propellant having a predetermined boiling point and a heating substance of water having a temperature higher than the boiling point, the engine comprising:an inner wall member having a circumferential surface; an outer wall member surrounding the inner wall

1. An engine using a nitrogen liquid phase propellant having a predetermined boiling point and a heating substance of water having a temperature higher than the boiling point, the engine comprising:an inner wall member having a circumferential surface; an outer wall member surrounding the inner wall member, the outer wall member having an interior surface spaced from the circumferential surface of the inner wall member by a predetermined distance such that the space between the circumferential surface and the interior surface form a mixing chamber having an opening; and injection means for injecting the nitrogen liquid-phase propellant and the heating substance of water into the mixing chamber so that the propellant is evaporated by the heating substance for creating a jet stream moving from the opening of the mixing chamber to the outside thereof without combustion. 2. The engine according to claim 1, wherein the inner wall member is shaped in the form of a cylinder having a top end and a bottom end, and the engine further comprises a nozzle part disposed at the bottom end of the inner wall member, the nozzle part having an outer diameter reducing in cross-section in a longitudinal direction away from the bottom end of the inner wall member.3. The engine according to claim 1, wherein the propellant and the heating substance are driven by a nitrogen gas and are fed to the injection means.4. The engine according to claim 1, wherein the water has a heightened saturation pressure, and the injection means injects the water having a heightened saturation pressure into the mixing chamber.5. A rocket comprising the engine according to claim 1.6. A rocket comprising:an inner wall member having a circumferential surface; an outer wall member surrounding the inner wall member, the outer wall member having an interior surface spaced from the circumferential surface of the inner wall member by a predetermined distance such that the space between the circumferential surface and the interior surface form a mixing chamber having an opening; a first tank holding a quantity of a nitrogen liquid-phase propellant having a predetermined boiling point; a second tank holding a quantity of a heating substance of water having a temperature higher than the boiling point of the liquid-phase propellant; and injection means for injecting the nitrogen liquid-phase propellant from the first tank and the heating substance of water from the second tank into the mixing chamber so that the propellant is evaporated by the heating substance for creating a jet stream moving from the opening of the mixing chamber to the outside thereof without combustion. 7. An engine using a nitrogen liquid phase propellant having a predetermined boiling point and a heating substance of water having a temperature higher than the boiling point, the engine comprising:an inner wall member having a circumferential surface; an outer wall member surrounding the inner wall member, the outer wall member having an interior surface spaced from the circumferential surface of the inner wall member by a predetermined distance such that the space between the circumferential surface and the interior surface form a mixing chamber having an opening; and injection means for injecting the nitrogen liquid-phase propellant and the heating substance of water into the mixing chamber so that the propellant is evaporated by the heating substance for creating a jet stream moving from the opening of the mixing chamber to the outside thereof solely by evaporation of the propellant. 8. The engine according to claim 7, wherein the inner wall member is shaped in the form of a cylinder having a top end and a bottom end, and the engine further comprises a nozzle part disposed at the bottom end of the inner wall member, the nozzle part having an outer diameter reducing in cross-section in a longitudinal direction away from the bottom end of the inner wall member.9. The engine according to claim 7, wherein the propellant and the heating substance are driven by a nitrogen gas and are fed to the injection means.10. The engine according to claim 7, wherein the water has a heightened saturation pressure, and the injection means injects the water having a heightened saturation pressure into the mixing chamber.11. A rocket comprising the engine according to claim 7.12. A rocket comprising:an inner wall member having a circumferential surface; an outer wall member surrounding the inner wall member, the outer wall member having an interior surface spaced from the circumferential surface of the inner wall member by a predetermined distance such that the space between the circumferential surface and the interior surface form a mixing chamber having an opening; a first tank holding a quantity of a nitrogen liquid-phase propellant having a predetermined boiling point; a second tank holding a quantity of a heating substance of water having a temperature higher than the boiling point of the nitrogen liquid-phase propellant; and injection means for injecting the nitrogen liquid-phase propellant and the heating substance of water into the mixing chamber so that the propellant is evaporated by the heating substance for creating a jet stream moving from the opening of the mixing chamber to the outside thereof solely by evaporation of the propellant.