US2544422A - Cooling means for a combustion chamber and nozzle in which solid fuel is burned - Google Patents
Cooling means for a combustion chamber and nozzle in which solid fuel is burned Download PDFInfo
- Publication number
- US2544422A US2544422A US27284A US2728448A US2544422A US 2544422 A US2544422 A US 2544422A US 27284 A US27284 A US 27284A US 2728448 A US2728448 A US 2728448A US 2544422 A US2544422 A US 2544422A
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- US
- United States
- Prior art keywords
- combustion chamber
- chamber
- nozzle
- burned
- cooling means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/97—Rocket nozzles
- F02K9/972—Fluid cooling arrangements for nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
- F02K9/32—Constructional parts; Details not otherwise provided for
- F02K9/40—Cooling arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S60/00—Power plants
- Y10S60/915—Collection of goddard patents
Definitions
- This invention relates to combustion chambers as used in propulsion apparatus, and relates more specifically to combustion chambers which have rearwardly-open discharge nozzles associated therewith and to which the propellant is supplied in the form of an elongated rod or bar of solid explosive material.
- Such a bar of solid material commonly burns relatively slowly, and progressively from the outer end of the combustion chamber inward.
- the discharge nozzle and the adiacent parts of the combu tion chamber are thus exposed for a considerable period to high temperature combustion gases and may easily become overheated.
- this invention contemplates the provision of improved means for cooling the discharge nozzle and the adjacent parts of the combustion chamber.
- sprays of water or a neutral liquid are supplied to the inner surface of the discharge nozzle and to adjacent combustion chamber surfaces, and the cooling liquid is sprayed under pre sure developed in the combustion chamber itself.
- the invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.
- FIG. 1 is a longitudinal section of a combustion chamber and nozzle embodying this invention
- Fig. 2 is an enlarged partial longitudinal sectional view of the device shown in Fig. l:
- Fig. 3 is a transverse sectional view, taken along the line 3-3 in Fig. 2.
- a combustion chamber C is shown as provided with a discharge nozzle N enclosed in a streamlined casing Ill
- the chamber C has a separable inner end portion l2 firmly seated therein but threaded to permit removal for reloading.
- a tubular support It may be associated with the end portion l2 if so desired.
- a bar B of solid explosive material is slidably mounted in the chamber C and at its-upper end engages a piston is which is also slidable in the chamber C and which preferably has an annular aopper packing ring it of U-shaped cross sec- Holes 20 in opposite side walls of the chamber C communicate through tubes 2
- a plurality of tangential spray openings 25 are formed in the lower end of the combustion chamber C and connect the interior of the annular member 22 with an annular open groove 21, formed in the inner face of the combustion chamber wall and adjacent the entrance to the nozzle N.
- Use of the annular groove 21 is optional and the groove may be omitted.
- the combustion chamber C is separated from the cap l2 and the bar B of explosive material is inserted through the open end of the chamber and may be located in the chamber by stop pins 30 (Fig. 2).
- the piston i6 is-then inserted, after which the space above the piston is filled with water or any neutral liquid L.
- the cap I2 is reinserted and firmly seated.
- the bar B and piston I B will be. moved gradually upward or'inward to maintain pressure on the cooling liquid L. If the parts are correctly proportioned. the time in which the bar B is completely consumed will approximate the time in which the mass of the liquid L in the inner end of the combustion chamber will be forced through the spray opening 25.
- the bar 3 may have a shallow longitudinal groove 33 which will permit a small portion of the combustion gases to enter the annular recess in the packing ring it and to expand the packing ring against the wall of the combustion chamber, thus preventing gas leakage.
- a cylindrical combustion chamber having a discharge nozzle and containing an elongated solid powder charge which is slidable inward in; said chamber and which is of substantially less length than said chamber.
- a piston slidabie in said chamber and engaged by the inner end of said powder charge, said chamber having a closed end member coacting with said piston to enclose a liquid-storage space, an annular casing member mounted on and external to said combustion chamber and positioned adjacent the open outer end thereoi, tubular connections from said liquid-storage space to said annular casing member, and spray passages from said annular casing member to the interior of II said combustion chamber.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spray-Type Burners (AREA)
Description
March 1951 R. H. GODDARD 2,544,422
coouuc MEANS FOR A COMBUSTION CHAMBER AND nozzm- IN WHICH sour) FUEL 1s auamao Filed May 15, 1948 v INVENTOR. $17. I ,Dac'ai. Esme-a6. .Qocutfi Patented Mar. 6, 1951,
UNITED s'rArss PATENT orncs COOLING MEANS FOR A COMBUSTION NOZZLE IN WHICH SOLID FUEL IS BURNED Robert H. Goddard, deceased, late of Annapolis,
Md., by Esther C. Goddard, executrix, Worcester, Mass., assignor of one-half to The Daniel and Florence Guggenheim Foundation, New York, N. 12, a corporation of New York Application May 15, 1948, Serial No. 27,284
1 Claim. (Cl. 6035.6)
CHAMBER AND This invention relates to combustion chambers as used in propulsion apparatus, and relates more specifically to combustion chambers which have rearwardly-open discharge nozzles associated therewith and to which the propellant is supplied in the form of an elongated rod or bar of solid explosive material.
Such a bar of solid material commonly burns relatively slowly, and progressively from the outer end of the combustion chamber inward. The discharge nozzle and the adiacent parts of the combu tion chamber are thus exposed for a considerable period to high temperature combustion gases and may easily become overheated.
To avoid such overheating, this invention contemplates the provision of improved means for cooling the discharge nozzle and the adjacent parts of the combustion chamber.
In the preferred form. sprays of water or a neutral liquid are supplied to the inner surface of the discharge nozzle and to adjacent combustion chamber surfaces, and the cooling liquid is sprayed under pre sure developed in the combustion chamber itself.
The invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.
A preferred form of the invention is shown in the drawing, in which Fig. 1 is a longitudinal section of a combustion chamber and nozzle embodying this invention;
Fig. 2 is an enlarged partial longitudinal sectional view of the device shown in Fig. l: and
Fig. 3 is a transverse sectional view, taken along the line 3-3 in Fig. 2.
Referring to the drawing, a combustion chamber C is shown as provided with a discharge nozzle N enclosed in a streamlined casing Ill The chamber C has a separable inner end portion l2 firmly seated therein but threaded to permit removal for reloading. A tubular support It may be associated with the end portion l2 if so desired.
A bar B of solid explosive material is slidably mounted in the chamber C and at its-upper end engages a piston is which is also slidable in the chamber C and which preferably has an annular aopper packing ring it of U-shaped cross sec- Holes 20 in opposite side walls of the chamber C communicate through tubes 2| with an annular member 22 which has an open inner side and which is permanently secured to the lower or outer end portion of the combustion chamber 2 in any convenient manner, as by brazing or welding.
A plurality of tangential spray openings 25 are formed in the lower end of the combustion chamber C and connect the interior of the annular member 22 with an annular open groove 21, formed in the inner face of the combustion chamber wall and adjacent the entrance to the nozzle N. Use of the annular groove 21 is optional and the groove may be omitted.
In the operation of this device, the combustion chamber C is separated from the cap l2 and the bar B of explosive material is inserted through the open end of the chamber and may be located in the chamber by stop pins 30 (Fig. 2). The piston i6 is-then inserted, after which the space above the piston is filled with water or any neutral liquid L. The cap I2 is reinserted and firmly seated.
When the bar 13 of propellant is then ignited, as by a hot wire R, the expanding combustion gases will exert pressure through the bar B and piston l6 against the water L in the inner part of the combustion chamber, and this water will be forced through the tubes 2| to the annular member 22, and then through the spray openings 25 and annular groove 21 to the inner surface of the nozzle N and to the adjacent inner end surface of the chamber 0.
As the sprays of liquid enter the combustion chamber tangentially, a protecting film will be formed on the surfaces particularly exposed to the high-temperature combustion gases.
As combustion continues and the cooling liquid is gradually forced into the chamber C through the relatively small spray openings 25, the bar B and piston I B will be. moved gradually upward or'inward to maintain pressure on the cooling liquid L. If the parts are correctly proportioned. the time in which the bar B is completely consumed will approximate the time in which the mass of the liquid L in the inner end of the combustion chamber will be forced through the spray opening 25.
The bar 3 may have a shallow longitudinal groove 33 which will permit a small portion of the combustion gases to enter the annular recess in the packing ring it and to expand the packing ring against the wall of the combustion chamber, thus preventing gas leakage.
Having thus described the invention and the advantages thereof, it will be understood that the invention is not to be limited to the details herein disclosed, otherwise than as set forth in the claim. v a but what is claimed is:
In propulsion apparatus. a cylindrical combustion chamber having a discharge nozzle and containing an elongated solid powder charge which is slidable inward in; said chamber and which is of substantially less length than said chamber. a piston slidabie in said chamber and engaged by the inner end of said powder charge, said chamber having a closed end member coacting with said piston to enclose a liquid-storage space, an annular casing member mounted on and external to said combustion chamber and positioned adjacent the open outer end thereoi, tubular connections from said liquid-storage space to said annular casing member, and spray passages from said annular casing member to the interior of II said combustion chamber.
ESTHER C. GODDARD. Ezecutrla: of the Last Will and Testament of Robert H. Goddard, Deceased.
g mme 4 nnmaaxcas man The Zollowing references are of recordin the file oithis patent:
UNITED s'rs'ms PATENTS Number Name Date 1,681,562 Wenstrom Aug. 21, 1928 2,016,921 Goddard Oct. 8, 1935 FOREIGN PATENTS Number Country Date 689,061 France May 20, 1930
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27284A US2544422A (en) | 1948-05-15 | 1948-05-15 | Cooling means for a combustion chamber and nozzle in which solid fuel is burned |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27284A US2544422A (en) | 1948-05-15 | 1948-05-15 | Cooling means for a combustion chamber and nozzle in which solid fuel is burned |
Publications (1)
Publication Number | Publication Date |
---|---|
US2544422A true US2544422A (en) | 1951-03-06 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US27284A Expired - Lifetime US2544422A (en) | 1948-05-15 | 1948-05-15 | Cooling means for a combustion chamber and nozzle in which solid fuel is burned |
Country Status (1)
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US (1) | US2544422A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2667839A (en) * | 1952-02-06 | 1954-02-02 | Carlo Joseph James De | Rocket motor hot ash extinguishing and cooling device |
US2740356A (en) * | 1950-08-04 | 1956-04-03 | Rotax Ltd | Cartridge with coolant |
US2978867A (en) * | 1957-03-29 | 1961-04-11 | Charles A Somville | Powder reactor for self-propelled projectiles |
US3049877A (en) * | 1956-02-13 | 1962-08-21 | Thiokol Chemical Corp | Nozzle for reaction motor |
US3077077A (en) * | 1959-07-01 | 1963-02-12 | Honeywell Regulator Co | Solid propellant pressurizing device |
US3079753A (en) * | 1950-07-22 | 1963-03-05 | Aerojet General Co | Hydroductor |
US3082666A (en) * | 1959-02-06 | 1963-03-26 | Acf Ind Inc | Method and apparatus for propulsion |
US3083527A (en) * | 1960-10-10 | 1963-04-02 | Phillips Petroleum Co | Hybrid rocket propulsion process |
DE1151409B (en) * | 1960-02-05 | 1963-07-11 | Boelkow Entwicklungen Kg | Annular gap nozzle for rocket engines |
US3127667A (en) * | 1959-06-23 | 1964-04-07 | United Aircraft Corp | Double thickness wall construction for rockets |
US3195302A (en) * | 1962-01-22 | 1965-07-20 | Atlantic Res Corp | Solid propellant grain of variable electron-emissive composition |
US3197959A (en) * | 1960-08-22 | 1965-08-03 | Honeywell Inc | Control apparatus |
US3289410A (en) * | 1964-06-17 | 1966-12-06 | William W Balwanz | Method and apparatus for weeding the flame plasma of a rocket exhaust |
US3305177A (en) * | 1963-07-12 | 1967-02-21 | Sud Aviation | Discharge nozzle for jet aircraft |
DE1240746B (en) * | 1964-08-08 | 1967-05-18 | Heinkel Ag Ernst | Jet nozzle, especially for the afterburner of an aircraft engine, with mechanically controlled jet deflection |
DE1246328B (en) * | 1963-06-18 | 1967-08-03 | Snecma | Device for protecting the rear floor of a missile |
US3397539A (en) * | 1965-04-07 | 1968-08-20 | Bolkow Gmbh | Solid fuel rocket with separate firing rate charge portions |
US3442085A (en) * | 1966-07-08 | 1969-05-06 | Robert Victor Bancelin | Impulsor with powder charge,particularly for percussion vibrations tests |
WO2012011853A1 (en) * | 2010-07-22 | 2012-01-26 | Saab Ab | Cooling device for cooling combustion gases from recoilless anti-tank weapons |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1681562A (en) * | 1925-03-17 | 1928-08-21 | Wenstrom William Holmes | Safety apparatus for airplanes |
FR689061A (en) * | 1930-01-29 | 1930-09-02 | Internal combustion turbine | |
US2016921A (en) * | 1930-02-19 | 1935-10-08 | Robert H Goddard | Means for cooling combustion chambers |
-
1948
- 1948-05-15 US US27284A patent/US2544422A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1681562A (en) * | 1925-03-17 | 1928-08-21 | Wenstrom William Holmes | Safety apparatus for airplanes |
FR689061A (en) * | 1930-01-29 | 1930-09-02 | Internal combustion turbine | |
US2016921A (en) * | 1930-02-19 | 1935-10-08 | Robert H Goddard | Means for cooling combustion chambers |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3079753A (en) * | 1950-07-22 | 1963-03-05 | Aerojet General Co | Hydroductor |
US2740356A (en) * | 1950-08-04 | 1956-04-03 | Rotax Ltd | Cartridge with coolant |
US2667839A (en) * | 1952-02-06 | 1954-02-02 | Carlo Joseph James De | Rocket motor hot ash extinguishing and cooling device |
US3049877A (en) * | 1956-02-13 | 1962-08-21 | Thiokol Chemical Corp | Nozzle for reaction motor |
DE1177417B (en) * | 1957-03-29 | 1964-09-03 | Charles A Somville | Overpressure safety device for a solid propellant rocket engine |
US2978867A (en) * | 1957-03-29 | 1961-04-11 | Charles A Somville | Powder reactor for self-propelled projectiles |
US3082666A (en) * | 1959-02-06 | 1963-03-26 | Acf Ind Inc | Method and apparatus for propulsion |
US3127667A (en) * | 1959-06-23 | 1964-04-07 | United Aircraft Corp | Double thickness wall construction for rockets |
US3077077A (en) * | 1959-07-01 | 1963-02-12 | Honeywell Regulator Co | Solid propellant pressurizing device |
DE1151409B (en) * | 1960-02-05 | 1963-07-11 | Boelkow Entwicklungen Kg | Annular gap nozzle for rocket engines |
US3197959A (en) * | 1960-08-22 | 1965-08-03 | Honeywell Inc | Control apparatus |
US3083527A (en) * | 1960-10-10 | 1963-04-02 | Phillips Petroleum Co | Hybrid rocket propulsion process |
US3195302A (en) * | 1962-01-22 | 1965-07-20 | Atlantic Res Corp | Solid propellant grain of variable electron-emissive composition |
DE1246328B (en) * | 1963-06-18 | 1967-08-03 | Snecma | Device for protecting the rear floor of a missile |
US3305177A (en) * | 1963-07-12 | 1967-02-21 | Sud Aviation | Discharge nozzle for jet aircraft |
US3289410A (en) * | 1964-06-17 | 1966-12-06 | William W Balwanz | Method and apparatus for weeding the flame plasma of a rocket exhaust |
DE1240746B (en) * | 1964-08-08 | 1967-05-18 | Heinkel Ag Ernst | Jet nozzle, especially for the afterburner of an aircraft engine, with mechanically controlled jet deflection |
US3397539A (en) * | 1965-04-07 | 1968-08-20 | Bolkow Gmbh | Solid fuel rocket with separate firing rate charge portions |
US3442085A (en) * | 1966-07-08 | 1969-05-06 | Robert Victor Bancelin | Impulsor with powder charge,particularly for percussion vibrations tests |
WO2012011853A1 (en) * | 2010-07-22 | 2012-01-26 | Saab Ab | Cooling device for cooling combustion gases from recoilless anti-tank weapons |
DE112010005752B4 (en) * | 2010-07-22 | 2014-11-13 | Saab Ab | Cooling device for cooling combustion gases from recoilless anti-tank weapons |
RU2533637C2 (en) * | 2010-07-22 | 2014-11-20 | Сааб Аб | Cooling device for cooling gaseous combustion products from recoilless anti-tank weapon |
US9291410B2 (en) | 2010-07-22 | 2016-03-22 | Saab Ab | Cooling device for cooling combustion gases from recoilless anti-tank weapons |
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