CA1180997A - Combustion chamber for pulsating combustion - Google Patents
Combustion chamber for pulsating combustionInfo
- Publication number
- CA1180997A CA1180997A CA000388651A CA388651A CA1180997A CA 1180997 A CA1180997 A CA 1180997A CA 000388651 A CA000388651 A CA 000388651A CA 388651 A CA388651 A CA 388651A CA 1180997 A CA1180997 A CA 1180997A
- Authority
- CA
- Canada
- Prior art keywords
- chamber
- partition wall
- combustion chamber
- fuel
- combustion
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 238000005192 partition Methods 0.000 claims abstract description 25
- 239000000446 fuel Substances 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 5
- 238000003763 carbonization Methods 0.000 abstract description 3
- 239000000567 combustion gas Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 206010061307 Neck deformity Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
APPLICANT: MARECK B.V.
TITLE: COMBUSTION CHAMBER FOR PULSATING COMBUSTION
ABSTRACT OF THE DISCLOSURE
A combustion chamber for pulsating combustion is separated by a partition wall into a first chamber to which there is connected an axial inlet for the fuel stream, and a second chamber for diverting the combustion gases through an outlet. The gases depart via side chambers from the first to the second chamber at the edges of the partition wall. A hot body is arranged at a given height above the partition wall in the first chamber, said body being intended for being heated during operation to a tempers-ture which is substantially higher than the carbonization temperature of the fuel and which screens off a central area of the partition wall.
TITLE: COMBUSTION CHAMBER FOR PULSATING COMBUSTION
ABSTRACT OF THE DISCLOSURE
A combustion chamber for pulsating combustion is separated by a partition wall into a first chamber to which there is connected an axial inlet for the fuel stream, and a second chamber for diverting the combustion gases through an outlet. The gases depart via side chambers from the first to the second chamber at the edges of the partition wall. A hot body is arranged at a given height above the partition wall in the first chamber, said body being intended for being heated during operation to a tempers-ture which is substantially higher than the carbonization temperature of the fuel and which screens off a central area of the partition wall.
Description
3'7 The present inven-tion relates to a combustion chamber of the kind disclosed in the preamble to the following main clairn.
Irl pulsating burners of the kind in question, there is a fuel nozzle a-t the inle-t to direc-t the s-tream of fuel axially into the first ch.mber in a direction towards a central area of the pertinent partl-tion wall in the combustion chamber. In the case where a liquid fuel such as oil is used, vaporization is already ob~ained in the inlet, but a portion of the fuel will impinge on the par-ti-tion wall in the form of vapour or fuel drops, For all conditions, some cooling of the partition wall is obtained, and this cooling can be so heavy in some cases that the fuel carbonizes, to be deposited as soot, which results in operational disturbances, especially when starting.
In accordance with a particular embodiment of the invention, there is provided a combustion chamber for pulsating combustion of a fuel-air mixture.
The chamber includes an inlet and outlet providing substantially axial inflow of the fuel-air mixture to a first chamber and substantially axial outflow from a second chamber. A partition wall is situated substantially in a radial plane and separates the two chambers to guide the steam of gases over the edges of the partition wall from the first chamber via a plurality of side chambers to the second chamber.
In accordance with the invention, a central area of the upper side of the partition wall in the first chamber is screened off by a hot body which is arranged at a predetermined height above the partition wall and serves as a fuel spreader.
The hot body in accordance with the invention spreads out the fuel while coming up to a temperature high enough to be substantially above the carboni~ation
Irl pulsating burners of the kind in question, there is a fuel nozzle a-t the inle-t to direc-t the s-tream of fuel axially into the first ch.mber in a direction towards a central area of the pertinent partl-tion wall in the combustion chamber. In the case where a liquid fuel such as oil is used, vaporization is already ob~ained in the inlet, but a portion of the fuel will impinge on the par-ti-tion wall in the form of vapour or fuel drops, For all conditions, some cooling of the partition wall is obtained, and this cooling can be so heavy in some cases that the fuel carbonizes, to be deposited as soot, which results in operational disturbances, especially when starting.
In accordance with a particular embodiment of the invention, there is provided a combustion chamber for pulsating combustion of a fuel-air mixture.
The chamber includes an inlet and outlet providing substantially axial inflow of the fuel-air mixture to a first chamber and substantially axial outflow from a second chamber. A partition wall is situated substantially in a radial plane and separates the two chambers to guide the steam of gases over the edges of the partition wall from the first chamber via a plurality of side chambers to the second chamber.
In accordance with the invention, a central area of the upper side of the partition wall in the first chamber is screened off by a hot body which is arranged at a predetermined height above the partition wall and serves as a fuel spreader.
The hot body in accordance with the invention spreads out the fuel while coming up to a temperature high enough to be substantially above the carboni~ation
- 2 - ~ t~
9~
temperature of the fuel by a large margin. The desired intense heating of the hot body is done with the aid of the hot gases in the first chamber in the combustion chamber, and by heat transmission from the partition wall to the hot body via the foot of the lat-ter.
The hot body in accordance with the inven-tion spreads the fuel and screens off the central area of the partition wall, which thus cannot be struck by cooling fuel. rrhe hot body simultaneously contributes, as is known in the art, to stabilizing the combusti~-n in the combustion chamber.
- 2a -n~
To further increase heating of the hot body, its foot can to advantage be formed as a pillar extending through an opening in the partition wall to be situated in the hot gases in the outlet.
Two suitable embodiments of the invention are shown as e~amples on the appended drawings.
FigO 1 is a schematic section through a combustion chamber for pulsating combustion~ the partition wall in the com-bustion chamber supporting a disc-shaped hot body in accordance with the invention, FigO 2 is a cross section along the line 2-2 in Fig. 1, Fig~ 3 is a cross section along the line 3-3 in FigO 1, Fig 4 is a side view of the 1~ second emhodiment, comprising a spherically shaped hot body with a pillar mounted in the opening in the partition wall according to Fig. 1, Fig. 5 is a view seen from below of the hnt body in Fig, 4, Fig~ 6 is a view from above, Fig~ 7 is a section along the line 7-7 in Fig D 4, Fig. 8 is a section along the line 8-8 in Fig 6, ana Fig. 9 shows the spherical hot body mounted in the combustion chamber.
The combustion chamber 10 in Fig. 1 is of known form and is divided by a partition wall 12 into a first chamber 14 and a second chamber 16, the latter merging into an outlet 18. Combustion air is inducted via an inlet 20, in which a nozzle 22 is arranged for spraying in fuel such as oil for admixture witn the combustion air. It will be seen ~rom Fig. 1 that the spread angle of the nozzle is comparatively small, resulting in that the uel is directed in a relative-ly concentrated jet into the first chamber 14, To avoid fuel particles impinging on the partition wall 12 in its central area, and thereby cooling this area to an undesirably iow temperature which can cause the formation of soot, a flat-shaped hot body 24 is arranged at a pre-determined height above the partition wall. In the example 9~
show~l, the hot body 24 is substantially circular, to give a uniform spread to the fuel irrespective of the width of the fuel jet.
The body 24 is carried by a foot or a support 26 in the form of ~our radial flanges 25,28,30,32 arranged in a cross.
The foot 26 has an upper part situated above the wall 12, and an extension portion 34 extending through a central hole 36 in the wall 12, down into the second chamber 16 and further down into the outlet 13.
-~ Each flange has a shoulder 38 resting on the wall 12.
After this shoulder, the width of the flanges is constant along a portion 40 for location in the hole 36 of the wall12. selow the partition wall 12~ the flanges taper off in a direction towards an end portion 42.
The fuel-air mixture and hot gases stream out conventionally from the central portion of the first chamber into a number of side chambers 44, over the edges of the partition wall 12 into its side chambers, down into the second chamber 16 and out through the outlet 18.
During operation, the hot body 24 is kept heated to a high temperature which is sufficient for the body 24 always to have a temperature substantially greater than the carboniza-tion te~perature of the fuel. The central area of the wall 12 will therefore lie in a protected position under the shielding hot body 24, so that the central area of the wall 12 will also retain a ~emperature which is so high that it is substantially above the carbonization temperature of the fuel~
The body 24 is heated by the hot gases in the first chamber.
Furthermore, the extended portion 34 of the foot or support 26 will be heated by the hot gases in the second chamber ~ D99~
and in the outlet. The heat spreads upwards in the foot and r~sults in ,there being supplementary heat to keep the body 29 hotO ~eat is also transmitted from the wall 12 to the foot ~6 and ~urtller to the body 24~ With its foot 26 the body 2~ is loosely inserted in the hope 36 in the wall 12 and therefore it can be easily lifted out and up through the inlet 20 f~r possible exchange. It is thus extremely easy to ~it or remove the body 24.
The e~bodiment according to Figs. 9 to 9, which has been developed further, has a substantially spherical hot body 50 carried by a short neck 51 with a flange 52 having slots 52a, said flange abutting the upper side of the wall 12.
Belo~ the flange 52~ the neck is'extended hy a pillar 53 which is located in the hole 36 in the wall 12 in the same way as the portion 34 is located in the hole 36 in Fig. 1.
The pillar 53 e~tends through the second chamber 16 and down into the outlet 18 to be heated by the exhaust yases.
The hot body 50 is formed at its upper end with a recess having a diameter of the same order of magnitude as the radius of the body 50. The depth of the recess is approxi-mately the same as its radius.
Around its spherical surface, the body 50 has a number ofunifor~ly distributed slits 55,56, the alternate slits 56 being in communication with the bowl~shaped recess 54 via radially transverse grooves 57.
For predetermined and comparatively constant operating conditions, the flat-shaped hot body ~4 according to Figs.
1 to 3 functions completely satisfactory for providing a reliakle start and stable operation, and for avoiding soot formation in the first chamber on the partition wall 12.
ngg~
~n khe other hand, if the operating conditions vary, inter alia with dif~erent types of fuels and varying loads, the spherically shaped hot hody 50 in Fig. 4 affords greater flexi~ility and security.
9~
temperature of the fuel by a large margin. The desired intense heating of the hot body is done with the aid of the hot gases in the first chamber in the combustion chamber, and by heat transmission from the partition wall to the hot body via the foot of the lat-ter.
The hot body in accordance with the inven-tion spreads the fuel and screens off the central area of the partition wall, which thus cannot be struck by cooling fuel. rrhe hot body simultaneously contributes, as is known in the art, to stabilizing the combusti~-n in the combustion chamber.
- 2a -n~
To further increase heating of the hot body, its foot can to advantage be formed as a pillar extending through an opening in the partition wall to be situated in the hot gases in the outlet.
Two suitable embodiments of the invention are shown as e~amples on the appended drawings.
FigO 1 is a schematic section through a combustion chamber for pulsating combustion~ the partition wall in the com-bustion chamber supporting a disc-shaped hot body in accordance with the invention, FigO 2 is a cross section along the line 2-2 in Fig. 1, Fig~ 3 is a cross section along the line 3-3 in FigO 1, Fig 4 is a side view of the 1~ second emhodiment, comprising a spherically shaped hot body with a pillar mounted in the opening in the partition wall according to Fig. 1, Fig. 5 is a view seen from below of the hnt body in Fig, 4, Fig~ 6 is a view from above, Fig~ 7 is a section along the line 7-7 in Fig D 4, Fig. 8 is a section along the line 8-8 in Fig 6, ana Fig. 9 shows the spherical hot body mounted in the combustion chamber.
The combustion chamber 10 in Fig. 1 is of known form and is divided by a partition wall 12 into a first chamber 14 and a second chamber 16, the latter merging into an outlet 18. Combustion air is inducted via an inlet 20, in which a nozzle 22 is arranged for spraying in fuel such as oil for admixture witn the combustion air. It will be seen ~rom Fig. 1 that the spread angle of the nozzle is comparatively small, resulting in that the uel is directed in a relative-ly concentrated jet into the first chamber 14, To avoid fuel particles impinging on the partition wall 12 in its central area, and thereby cooling this area to an undesirably iow temperature which can cause the formation of soot, a flat-shaped hot body 24 is arranged at a pre-determined height above the partition wall. In the example 9~
show~l, the hot body 24 is substantially circular, to give a uniform spread to the fuel irrespective of the width of the fuel jet.
The body 24 is carried by a foot or a support 26 in the form of ~our radial flanges 25,28,30,32 arranged in a cross.
The foot 26 has an upper part situated above the wall 12, and an extension portion 34 extending through a central hole 36 in the wall 12, down into the second chamber 16 and further down into the outlet 13.
-~ Each flange has a shoulder 38 resting on the wall 12.
After this shoulder, the width of the flanges is constant along a portion 40 for location in the hole 36 of the wall12. selow the partition wall 12~ the flanges taper off in a direction towards an end portion 42.
The fuel-air mixture and hot gases stream out conventionally from the central portion of the first chamber into a number of side chambers 44, over the edges of the partition wall 12 into its side chambers, down into the second chamber 16 and out through the outlet 18.
During operation, the hot body 24 is kept heated to a high temperature which is sufficient for the body 24 always to have a temperature substantially greater than the carboniza-tion te~perature of the fuel. The central area of the wall 12 will therefore lie in a protected position under the shielding hot body 24, so that the central area of the wall 12 will also retain a ~emperature which is so high that it is substantially above the carbonization temperature of the fuel~
The body 24 is heated by the hot gases in the first chamber.
Furthermore, the extended portion 34 of the foot or support 26 will be heated by the hot gases in the second chamber ~ D99~
and in the outlet. The heat spreads upwards in the foot and r~sults in ,there being supplementary heat to keep the body 29 hotO ~eat is also transmitted from the wall 12 to the foot ~6 and ~urtller to the body 24~ With its foot 26 the body 2~ is loosely inserted in the hope 36 in the wall 12 and therefore it can be easily lifted out and up through the inlet 20 f~r possible exchange. It is thus extremely easy to ~it or remove the body 24.
The e~bodiment according to Figs. 9 to 9, which has been developed further, has a substantially spherical hot body 50 carried by a short neck 51 with a flange 52 having slots 52a, said flange abutting the upper side of the wall 12.
Belo~ the flange 52~ the neck is'extended hy a pillar 53 which is located in the hole 36 in the wall 12 in the same way as the portion 34 is located in the hole 36 in Fig. 1.
The pillar 53 e~tends through the second chamber 16 and down into the outlet 18 to be heated by the exhaust yases.
The hot body 50 is formed at its upper end with a recess having a diameter of the same order of magnitude as the radius of the body 50. The depth of the recess is approxi-mately the same as its radius.
Around its spherical surface, the body 50 has a number ofunifor~ly distributed slits 55,56, the alternate slits 56 being in communication with the bowl~shaped recess 54 via radially transverse grooves 57.
For predetermined and comparatively constant operating conditions, the flat-shaped hot body ~4 according to Figs.
1 to 3 functions completely satisfactory for providing a reliakle start and stable operation, and for avoiding soot formation in the first chamber on the partition wall 12.
ngg~
~n khe other hand, if the operating conditions vary, inter alia with dif~erent types of fuels and varying loads, the spherically shaped hot hody 50 in Fig. 4 affords greater flexi~ility and security.
Claims (7)
1. A combustion chamber for pulsating combustion of a fuel-air mixture, including inlet and outlet providing substantially axial inflow of the fuel-air mixture to a first chamber and substantially axial outflow from a second chamber, as well as a partition wall situated substantially in a radial plane and separating the two chambers to guide the steam of gases over the edges of the partition wall from the first chamber via a plurality of side chambers to the second chamber, characterized in that a central area of the upper side of the partition wall in the first chamber is screened off by a hot body which is arranged at a predetermined height above the partition wall and serves as a fuel spreader.
2. A combustion chamber as claimed in claim 1, characterized in that the hot body has a concave striking surface facing towards the inlet for the fuel drops,
3. A combustion chamber as claimed in claim 1, characterized in that the hot body is substantially spherically shaped.
4. A combustion chamber as claimed in claim 3, characterized in that the upper end of the spherically shaped hot body is provided with at least one recess for the reception of fuel drops.
5. A combustion chamber as claimed in claim 4, characterized in that the diameter of the recess is of the same order of magnitude as the radius of the spherical body, and in that the depth of the recess is approximately equal to its radius.
6. A combustion chamber as claimed in claim 3, characterized in that a plurality of uniformly distri-buted, axial slits are made in the spherical surface of the body
7. A combustion chamber as claimed in claim 1, characterized in that the hot body is carried by a foot which is extended and passes through an opening in the partition wall and is guided in the latter, and has a portion situated below the opening, said portion being situated in the second chamber and in the outlet for being heated by the exhaust gases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000388651A CA1180997A (en) | 1981-10-23 | 1981-10-23 | Combustion chamber for pulsating combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000388651A CA1180997A (en) | 1981-10-23 | 1981-10-23 | Combustion chamber for pulsating combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1180997A true CA1180997A (en) | 1985-01-15 |
Family
ID=4121252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000388651A Expired CA1180997A (en) | 1981-10-23 | 1981-10-23 | Combustion chamber for pulsating combustion |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1180997A (en) |
-
1981
- 1981-10-23 CA CA000388651A patent/CA1180997A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0435567Y2 (en) | ||
| US4397356A (en) | High pressure combustor for generating steam downhole | |
| US4518346A (en) | Gas fuel burner with incorporated ignition and safety devices | |
| US2986206A (en) | Combustion device for liquid fuel | |
| US5879154A (en) | Flame spreader-type fuel burner with lowered NOx emissions | |
| EP0057218B1 (en) | Combustion chamber for pulsating combustion | |
| US4547147A (en) | Combustion device for a car | |
| CA1180997A (en) | Combustion chamber for pulsating combustion | |
| US3947230A (en) | Combustion chamber device with a rotary cup-shaped fuel-spreader | |
| RU2040731C1 (en) | Fuel gasification burner | |
| EP0284004B1 (en) | Radiant wall burner apparatus | |
| CA1166905A (en) | Heating device for preheating combustion air for an internal combustion engine | |
| US4634371A (en) | Intermediary channel for a feeding device for a pulsatory combustion chamber | |
| IE52029B1 (en) | Combustion chamber for pulsating combustion | |
| KR200178206Y1 (en) | Burner structure of gas equipment | |
| US2445302A (en) | Apparatus for burning liquid fuel | |
| SU1643870A1 (en) | Nozzle of gas distributing grate | |
| US2700417A (en) | Recirculating vaporizing liquid fuel burner | |
| SU1590845A1 (en) | BURNER DEVICE | |
| KR0135818Y1 (en) | Burner structure of kerosene combustor with dispersing body | |
| RU2062950C1 (en) | Torch tube | |
| JP3143282B2 (en) | Liquid fuel combustion device | |
| SU1048241A1 (en) | Transpiration burner | |
| JP3081389B2 (en) | Liquid fuel combustion device | |
| JPS6314184Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |