CN100436945C - Fuel pre-evaporation and premix perforated pipe - Google Patents
Fuel pre-evaporation and premix perforated pipe Download PDFInfo
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- CN100436945C CN100436945C CNB2006101125283A CN200610112528A CN100436945C CN 100436945 C CN100436945 C CN 100436945C CN B2006101125283 A CNB2006101125283 A CN B2006101125283A CN 200610112528 A CN200610112528 A CN 200610112528A CN 100436945 C CN100436945 C CN 100436945C
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- evaporation
- premix
- perforated pipe
- tube wall
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Abstract
A preevaporating and premixing multihole tube of fuel oil is unit for preparing fuel oil of combustion chamber on gas turbine, which consists of oil supply unit, nozzle section and mixing section. It is featured as drilling straight holes on tube wall of nozzle section, setting outlet of nozzle section to be contraction form and drilling straight holes and slope holes on the wall of mixing section.
Description
Technical field
The present invention relates to a kind of low novel fuel preparation device that pollutes gas-turbine combustion chamber that is used for, particularly with the fuel oil prevapourising premixed pipe of porous.
Background technology
The fuel pre-evaporation and premix perforated pipe that the present invention relates to derives from the development of combustion with reduced pollutants technology.For the disposal of pollutants of industry of control modern gas turbines and civil aircraft engine comprehensively, need new combustion with reduced pollutants technology.Along with both at home and abroad to the combustion with reduced pollutants Study on Technology, develop gradually and the multiple technologies scheme, comprise fractional combustion chamber technology, oil-poor prevapourising pre-mixing combustion technology (Lean PremixedPrevaporized Combustor abbreviates LPP as), catalytic combustion technology and variable geometry combustor or the like.But the technology that tool potentiality reduce disposal of pollutants is an oil-poor prevapourising pre-mixing combustion technology (LPP), and this technology enters the practical stage.Lean pre-mixed prevapourising combustion technology is to use the EVAP device before fuel oil enters the combustion chamber, makes fuel oil carry out prevapourising in this device and closes with air pre-mixing, forms the gas mixture of oil-poor state, enters the mode of burning in the combustion chamber then.The fuel oil preparation device that fuel pre-evaporation and premix perforated pipe of the present invention comes to this.From before research find that evaporation rate and the oil gas mixing uniformity of fuel oil in the EVAP device is in close relations to final reduction disposal of pollutants, good fuel evaporation rate and uniformly oil gas be mixed with and be beneficial to the reduction disposal of pollutants.
The fuel oil preparation device that uses in many oil-poor prevapourising pre-mixing combustion technology is arranged at present, comprise that employing adds cyclone at evaporation tube inlet or exit, utilizes the air rotational flow to finish the oil gas blending; Adopt long evaporation tube structure, the increase time of staying of fuel oil in evaporation tube finishes EVAP and oil gas mixes; Or adopt a plurality of tangential pipes, in pipe, spray into fuel oil or the like mode.What present fuel oil prevapourising pre-mixing apparatus mainly relied on is that DIFFUSION IN TURBULENCE is carried out the mode that oil gas mixes, and mixing velocity is slow, exists size bigger, the unfavorable problem of EVAP premixing effect.
Summary of the invention
The problem that the present invention solves is: overcome the deficiencies in the prior art, a kind of novel fuel pre-evaporation and premix perforated pipe that obtains high efficiency fuel evaporation and good oil gas mixed performance in limited space rapidly is provided, and it has improved the evaporation rate and the oil gas mixing uniformity of fuel oil; Adopt the method for punching simultaneously, avoided the use of cyclone or tangential pipe, simplify the structure, reduced size.
Technical solution of the present invention: fuel pre-evaporation and premix perforated pipe, it is characterized in that: form by fuel feeding part, nozzle segment and mixer, fuel nozzle is positioned at nozzle segment, on the tube wall of nozzle segment, be equipped with straight hole, the outlet of nozzle segment is collapsed shape, is equipped with straight hole and inclined hole on the tube wall of mixer.
Operation principle of the present invention: the fuel oil of fuel feeding section arrives the fuel nozzle place of nozzle segment by the fuel gallery, the secondary-atomizing air enters in the passage of fuel nozzle and the formation of nozzle segment tube wall by the straight hole on the nozzle segment tube wall simultaneously, the outlet of closing up by band sprays into mixer, because the outlet band is for shrinking outlet, so the speed of secondary-atomizing air in the exit will become big, and by outlet the time, same fuel oil by this outlet is carried out secondary-atomizing, the fuel oil and the air of atomizing enter mixer respectively, dilution air enters perpendicular to central axis from the straight hole of mixer wall simultaneously, mix with the fuel oil collision of ejection rapidly, bring the part mist of oil into the antipriming pipe center, improve fuel oil at antipriming pipe perpendicular to the distribution situation on the central axis cross section, and tentatively mix with fuel oil, in addition, dilution air has also reduced the radial velocity of fuel oil, avoids mist of oil and porous tube wall to bump; Rotational flow air tangentially enters from the inclined hole of mixer tube wall, thereby drive all gas mixtures (fuel oil+secondary-atomizing air+dilution air+rotational flow air) and produce rotational flow, increase the turbulivity in the pipe, strengthen the heat and mass between the oil gas, fuel oil is further evaporated and fully mix with air.The rotational flow of rotational flow air will produce the recirculating zone in the antipriming pipe exit simultaneously, be beneficial to and produce stable burning.
The advantage that the present invention compared with prior art has is as follows:
(1) fuel oil has atomization process twice in the antipriming pipe, and atomizing effect is good, and the multiply high temperature air enters antipriming pipe with different directions, and fuel oil fully contacts with high temperature air, can obtain the fuel evaporation rate more than 90% rapidly;
(2) multiply high temperature air and mist of oil carry out blending, and the oil gas incorporation time is short, good uniformity, and oil gas mixes unevenness and is lower than 10%;
(3) high temperature air enters antipriming pipe by aperture, has avoided the use of other devices such as cyclone, and whole apparatus structure is simple, and size is little.
Description of drawings
Fig. 1 is a fuel pre-evaporation and premix perforated pipe structural representation of the present invention;
Fig. 2 is a fuel feeding section enlarged drawing of the present invention;
Fig. 3 is a nozzle segment enlarged drawing of the present invention;
Fig. 4 is a mixer enlarged drawing of the present invention;
Fig. 5 is the profile of inclined hole among Fig. 4;
Structural representation when Fig. 6 is 0 ° for the angle of shrinking outlet in the nozzle segment of the present invention;
Structural representation when Fig. 7 is 8 rows for the quantity of inclined hole in the mixer of the present invention;
Fig. 8 is the profile of inclined hole among Fig. 7;
Fig. 9 is the inclination aspect of last row's inclined hole in the mixer of the present invention and the direction opposite configuration schematic diagram of preceding 5 row's inclined holes;
Figure 10 is the profile of inclined hole among Fig. 9;
Figure 11 is the structural representation that the angle of inclination of inclined hole in the mixer of the present invention diminishes;
Figure 12 is the profile of inclined hole among Figure 11.
The specific embodiment
Shown in Fig. 1,2,3,4, the present invention is made up of fuel feeding part 1, nozzle segment 3 and mixer 4.Fuel feeding part 1 comprises fuel inlet 5 and interface channel 6, and interface channel 6 is fixedlyed connected with external equipment by flange 7; The outlet of interface channel 6 is connected with the fuel nozzle 2 of nozzle segment 3, wherein fuel nozzle 2 adopts swirl atomizer, on the tube wall 8 of nozzle segment 3, be equipped with 6-12, diameter is the straight hole 9 of 2.2～3.2mm, and the outlet 10 of nozzle segment 3 is collapsed shape, and 11 are equipped with 4～10 of rows on the tube wall of mixer 4, diameter is the straight hole of 3.0～5.4mm and the inclined hole 13 that diameter is 2mm, wherein inclined hole 4-8 arranges, 50～100 of inclined hole total quantitys, 25 °～50 ° of inclined hole angles.
Table 1 provides the concrete size among above-mentioned each figure
Table 1
The fuel flow process is as follows, and as Fig. 2, shown in Figure 3, fuel inlet 5 is connected with outside fueller (not shown), and the fuel oil that is provided arrives the nozzle place by the fuel gallery of linkage section 6, and sprays into mixer by nozzle 2.
Air flow process is as follows, as shown in Figure 3, the secondary-atomizing air enters in the passage of nozzle and the formation of antipriming pipe tube wall by the straight hole 9 on the antipriming pipe nozzle segment tube wall 8, the outlet 10 of closing up by band subsequently sprays into antipriming pipe EVAP mixer, because outlet 10 bands are for shrinking outlet, so the speed of secondary-atomizing air in the exit will become greatly, and by outlet the time, same fuel oil by this outlet is carried out secondary-atomizing.
The dilution air flow process is seen Fig. 4, dilution air enters antipriming pipe from straight hole 12 perpendicular to the antipriming pipe central axis, mix with the fuel oil collision of ejection rapidly, bring the part mist of oil into the antipriming pipe center, improve fuel oil at antipriming pipe perpendicular to the distribution situation on the central axis cross section, and tentatively mix with fuel oil.In addition, dilution air has also reduced the radial velocity of fuel oil, avoids mist of oil and porous tube wall to bump.
The flow process of rotational flow air is seen Fig. 4, rotational flow air tangentially enters antipriming pipe from inclined hole 13, thereby drive all gas mixtures (fuel oil+secondary-atomizing air+dilution air+rotational flow air) and produce rotational flow, increase the turbulivity in the pipe, strengthen the heat and mass between the oil gas, fuel oil is further evaporated and fully mix with air.The rotational flow of rotational flow air will produce the recirculating zone in the antipriming pipe exit simultaneously, be beneficial to and produce stable burning.
The above-mentioned secondary-atomizing air of the present invention accounts for total air mass flow 10%～25%, and dilution air accounts for 40%～45%, and rotational flow air accounts for 35%～45%.
Claims (7)
1, fuel pre-evaporation and premix perforated pipe, it is characterized in that: form by fuel feeding part (1), nozzle segment (3) and mixer (4), fuel nozzle (2) is positioned at nozzle segment (3), on the tube wall (8) of nozzle segment (3), be equipped with straight hole (9), the outlet (10) of nozzle segment (3) is collapsed shape, and (11) are equipped with straight hole (12) and inclined hole (13) on the tube wall of mixer (4).
2, fuel pre-evaporation and premix perforated pipe according to claim 1 is characterized in that: fuel nozzle (2) is a swirl atomizer.
3, fuel pre-evaporation and premix perforated pipe according to claim 1 is characterized in that: the quantity that described nozzle segment (3) tube wall (8) is gone up straight hole (9) is 6-12, and diameter is 2.2～3.2mm.
4, fuel pre-evaporation and premix perforated pipe according to claim 1 is characterized in that: the quantity that described mixer (4) tube wall (11) is gone up straight hole (12) is 4～10 of rows, and the diameter of straight hole (12) is 3.0～5.4mm.
5, fuel pre-evaporation and premix perforated pipe according to claim 1 is characterized in that: described mixer (4) tube wall (11) is gone up inclined hole (13) 4-8 row, 50～100 of inclined hole total quantitys, the diameter 2mm of inclined hole (13), 25 °～50 ° of inclined hole angles.
6, fuel pre-evaporation and premix perforated pipe according to claim 1 is characterized in that: the angle of the contraction outlet (10) of described nozzle segment (3) is 0 °～45 °.
7, fuel pre-evaporation and premix perforated pipe according to claim 1 is characterized in that: the angle of described contraction outlet (10) is equivalent to a baffle plate when being 0 °, has the circular port that diameter is 8mm in the centre of baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101125283A CN100436945C (en) | 2006-08-23 | 2006-08-23 | Fuel pre-evaporation and premix perforated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101125283A CN100436945C (en) | 2006-08-23 | 2006-08-23 | Fuel pre-evaporation and premix perforated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1912368A CN1912368A (en) | 2007-02-14 |
| CN100436945C true CN100436945C (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101125283A Expired - Fee Related CN100436945C (en) | 2006-08-23 | 2006-08-23 | Fuel pre-evaporation and premix perforated pipe |
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| CN (1) | CN100436945C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788157B (en) * | 2010-01-26 | 2012-03-14 | 北京航空航天大学 | Low-pollution combustion chamber provided with premixing and pre-evaporating ring pipe |
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| CN102721082B (en) * | 2012-06-26 | 2014-08-20 | 哈尔滨工程大学 | Cracking-gas fuel injection device for chemical regenerative cycle |
| CN105627365A (en) * | 2016-01-19 | 2016-06-01 | 西北工业大学 | Micro combustion chamber punching type evaporation pipe |
| CN106838988A (en) * | 2017-01-11 | 2017-06-13 | 南方科技大学 | Fuel nozzle |
| CN107044636B (en) * | 2017-04-27 | 2018-11-06 | 中国科学院工程热物理研究所 | A kind of vaporizer tube combustor fuel injection equipment (FIE) |
| CN107726364B (en) * | 2017-09-26 | 2020-08-14 | 中国科学院工程热物理研究所 | Evaporation tube combustion chamber |
| CN107702146B (en) * | 2017-10-12 | 2019-10-18 | 四川航天中天动力装备有限责任公司 | For the indoor porous evaporator medium pipe of micro gas turbine engine burning |
| CN108167863A (en) * | 2017-12-14 | 2018-06-15 | 西北工业大学 | A kind of tiny engine combustion chamber evaporation tube with inlet swirl vane |
| CN108412643B (en) * | 2018-06-08 | 2024-02-13 | 哈尔滨工业大学 | Vaporization mechanism |
| CN111207414A (en) * | 2020-01-17 | 2020-05-29 | 西北工业大学 | Strong rotational flow centrifugal reflux type nozzle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10185196A (en) * | 1996-12-19 | 1998-07-14 | Ishikawajima Harima Heavy Ind Co Ltd | Prevaporization and premixing structure for liquid fuel in gas turbine combustor |
| JP2000314526A (en) * | 1999-04-28 | 2000-11-14 | Ishikawajima Harima Heavy Ind Co Ltd | Pre-evaporation/premixing burner and premixing burner for gas turbine combustor |
| US6189314B1 (en) * | 1998-09-01 | 2001-02-20 | Honda Giken Kogyo Kabushiki Kaisha | Premix combustor for gas turbine engine |
| CN1743735A (en) * | 2005-09-29 | 2006-03-08 | 北京航空航天大学 | Evaporation pipe type miniature-small-sized engine combustion chamber |
-
2006
- 2006-08-23 CN CNB2006101125283A patent/CN100436945C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10185196A (en) * | 1996-12-19 | 1998-07-14 | Ishikawajima Harima Heavy Ind Co Ltd | Prevaporization and premixing structure for liquid fuel in gas turbine combustor |
| US6189314B1 (en) * | 1998-09-01 | 2001-02-20 | Honda Giken Kogyo Kabushiki Kaisha | Premix combustor for gas turbine engine |
| JP2000314526A (en) * | 1999-04-28 | 2000-11-14 | Ishikawajima Harima Heavy Ind Co Ltd | Pre-evaporation/premixing burner and premixing burner for gas turbine combustor |
| CN1743735A (en) * | 2005-09-29 | 2006-03-08 | 北京航空航天大学 | Evaporation pipe type miniature-small-sized engine combustion chamber |
Non-Patent Citations (2)
| Title |
|---|
| 冲击加发散双层壁冷却方式降压分配对斜孔内对流还热影响的研究. 林宇震等.航空学报，第24卷第2期. 2003 |
| 冲击加发散双层壁冷却方式降压分配对斜孔内对流还热影响的研究. 林宇震等.航空学报，第24卷第2期. 2003 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788157B (en) * | 2010-01-26 | 2012-03-14 | 北京航空航天大学 | Low-pollution combustion chamber provided with premixing and pre-evaporating ring pipe |
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| Publication number | Publication date |
|---|---|
| CN1912368A (en) | 2007-02-14 |
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Granted publication date: 20081126 Termination date: 20120823 |