CN110469369A - A kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes - Google Patents
A kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes Download PDFInfo
- Publication number
- CN110469369A CN110469369A CN201910770590.9A CN201910770590A CN110469369A CN 110469369 A CN110469369 A CN 110469369A CN 201910770590 A CN201910770590 A CN 201910770590A CN 110469369 A CN110469369 A CN 110469369A
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- CN
- China
- Prior art keywords
- splitterr vanes
- movable vane
- carbon dioxide
- supercritical carbon
- runner
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
Abstract
Including spiral case and stator blade leaf grating, movable vane cascade and the splitterr vanes of inner spiral casing are arranged in the kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes that the invention discloses a kind of；Wherein, splitterr vanes are mounted between two neighboring movable vane cascade, and stator blade leaf grating runner is formed between two neighboring stator blade leaf grating, and movable vane cascade runner is formed between movable vane cascade and splitterr vanes；When work, supercritical carbon dioxide working medium is entered by spiral case, by spiral case uniform blasting into stator blade leaf grating runner, working medium pressure in stator blade leaf grating runner gradually decreases, flow velocity is gradually increased, and is subsequently entered in movable vane cascade runner, in movable vane cascade runner, supercritical carbon dioxide working medium pushes impeller to rotate output work, finally along axial discharge.In the present invention, the pneumatic efficiency of the radial turbine structure is greatly improved while guaranteeing safety in operation in the addition of splitterr vanes and the improvement project at impeller inlet geometry angle, has important engineering significance and wide application prospect.
Description
Technical field
The invention belongs to supercritical carbon dioxide radial turbine technical fields, and in particular to a kind of kW with splitterr vanes
Grade supercritical carbon dioxide radial turbine structure.
Background technique
As world energy sources reserves are constantly reduced, environmental pollution is got worse, and energy-saving and emission-reduction increasingly become the weight of development
Want direction.For carbon dioxide as one of atmosphere Common materials, it is very easy to obtain.Meanwhile compared to traditional working-medium water
Steam, carbon dioxide critical point pressure and temperature are lower, are easy to reach.In the supercritical state, carbon dioxide have high density,
The characteristics such as low-viscosity, mobility are strong, acting ability is strong, system loss is small.In addition, using supercritical carbon dioxide following for working medium
Ring has many advantages, such as that compact-sized, processing technology is simple, cycle efficieny is high.Therefore, supercritical carbon dioxide is considered as new generation
One of most potential cycle fluid of discipline, and use supercritical carbon dioxide to be also considered as the power generation cycle of working medium and take
It is recycled for conventional electric power generation, realizes one of the important channel that high efficiency of energy utilizes.
Radial turbine have under compact-sized, processing technology is simple, acting ability is strong and small flow rate efficiency compared with
The features such as high, the important role in following Brayton cycle development.Currently, for using supercritical carbon dioxide as working medium
The research of radial turbine increase year by year, but the feature big due to working medium density, the size of supercritical carbon dioxide turbine compared with
It is small, it is easy to form biggish secondary flow loss between stator blade and movable vane runner, and then have an impact the aeroperformance of turbine.Together
When, blade is easy then to be generated biggish equivalent stress by biggish aerodynamic loading, unfavorable to the safe operation of turbine.
Splitterr vanes technology is commonly used in centrifugal compressor, can improve the flowing shape in compressor impeller exit
Condition.And it is directed to the design requirement of radial turbine, the present invention, which is paid close attention to, reduces by kW grades of small-sized supercritical carbon dioxide radial turbines
Aerodynamic loss, improve the safety of operating turbine, a kind of turbine structure with splitterr vanes be provided.
Summary of the invention
Present invention is generally directed to the deficiencies in the prior art, provide a kind of kW grade supercritical carbon dioxide with splitterr vanes
Radial turbine structure, for improving the isentropic efficiency of kW grades of small-sized supercritical carbon dioxide radial turbines, improving flowing effect
Fruit reduces energy loss, enhancing safety in operation, and has wide future in engineering applications.
In order to achieve the above objectives, the present invention adopts the following technical scheme that realize:
A kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes, including spiral case and setting
Stator blade leaf grating, movable vane cascade and the splitterr vanes of spiral case；Wherein,
Splitterr vanes are mounted between two neighboring movable vane cascade, and stator blade cascade flow is formed between two neighboring stator blade leaf grating
Road forms movable vane cascade runner between movable vane cascade and splitterr vanes；When work, supercritical carbon dioxide working medium by spiral case into
Enter, by spiral case uniform blasting into stator blade leaf grating runner, working medium pressure in stator blade leaf grating runner is gradually decreased, and flow velocity gradually increases
Greatly, it subsequently enters in movable vane cascade runner, in movable vane cascade runner, supercritical carbon dioxide working medium pushes impeller rotation output
Function, finally along axial discharge.
A further improvement of the present invention lies in that the carbon dioxide working medium state at any one place is equal in the radial turbine structure
In a supercritical state, i.e., temperature is higher than 31.1 DEG C, and pressure is higher than 7.4MPa.
A further improvement of the present invention lies in that the radial turbine revolving speed is 20000-50000rpm, power 200-
300kW, flow 4-8kg/s, expansion ratio 1.5-2, inlet temperature are 500-600 DEG C.
A further improvement of the present invention lies in that the import geometry angle of movable vane cascade and splitterr vanes (4) is 70 °.
A further improvement of the present invention lies in that splitterr vanes are d at a distance from movable vane cascade (3) suction surface and pressure face
=0.5s, wherein s is the pitch of movable vane cascade.
A further improvement of the present invention lies in that splitterr vanes use the chord length at blade root for lb=0.6l, splitterr vanes leaf
Chord length l at topt=0.4l, wherein l is movable vane cascade chord length.
A further improvement of the present invention lies in that wall surface is all made of multistage involute composition inside and outside spiral case.
Compared with prior art, the present invention has the advantage that
Present invention incorporates the advantages of the prior art, propose a kind of kW grade supercritical carbon dioxide diameter with splitterr vanes
Streaming turbine structure, installs splitterr vanes additional between radial turbine movable vane cascade, while wall surface is all made of multistage gradually inside and outside spiral case
Burst at the seams composition, it is ensured that good Income Air Status.Since supercritical carbon dioxide working medium density is larger, in radial turbine
Exit vane consistency is larger, and inlet vane consistency is smaller, and installing splitterr vanes additional in the middle part of the movable vane cascade of impeller can effectively mention
High turbine isentropic efficiency, while improving the flow condition of impeller eye suction surface side and pressure surface side, reduce aerodynamic loss.
Further, the chord length at splitterr vanes blade root is lb=0.6l, the chord length l at leaf topt=0.4l can reduce half-open
Secondary flow loss in formula impeller in movable vane cascade channel, inlet vane angle are that 70 ° of structure can better adapt to impeller and enter
Flow condition at mouthful reduces profile loss；Meanwhile splitterr vanes can share the aerodynamic loading of part primary blades, reduce single
Equivalent stress suffered by a blade meets the intensity requirement and safe operation demand of turbomachinery.
In conclusion a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes of the present invention can make
Turbine modular construction in supercritical carbon dioxide Brayton cycle is compact, pneumatic efficiency is high, operational safety, has extensive work
Journey application prospect.
Detailed description of the invention
Fig. 1 is three dimensional structure diagram of the invention；
Fig. 2 is the blade wheel structure schematic diagram of the invention with splitterr vanes.
Description of symbols:
1, spiral case, 2, stator blade leaf grating, 3, movable vane cascade, 4, splitterr vanes, 5, stator blade leaf grating runner, 6, movable vane cascade stream
Road.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawing:
A kind of kW grade supercritical carbon dioxide radial turbine with splitterr vanes provided by the invention combined with Figure 1 and Figure 2,
Structure, including spiral case 1, stator blade leaf grating 2, movable vane cascade 3 and splitterr vanes 4, wherein splitterr vanes 4 are mounted on two neighboring movable vane
Between leaf grating 3, two neighboring stator blade leaf grating 2 forms stator blade leaf grating runner 5, forms movable vane between movable vane cascade 3 and splitterr vanes 4
Leaf grating runner 6.When work, supercritical carbon dioxide working medium is entered by spiral case 1, by 1 uniform blasting of spiral case to stator blade leaf grating runner 5
In.Working medium pressure in stator blade leaf grating runner 5 gradually decreases, and flow velocity is gradually increased, and is subsequently entered in movable vane cascade runner 6.In
In movable vane cascade runner 6, supercritical carbon dioxide working medium pushes impeller to rotate output work, finally along axial discharge.
Using the fluid dynamic numerical analysis method of three-dimensional computations, to the turbine that splitterr vanes are not added and this hair is added
The supercritical carbon dioxide radial turbine of the bright structure splitterr vanes carries out simulation calculating, and the results are shown in Table 1.From table
As can be seen that the radial turbine output power that splitterr vanes structure of the present invention is added is improved from original 246kW to 266kW,
Isentropic efficiency has been increased to 85.35% from original 83.09%, and efficiency absolute value improves 2.26 percentages.Pass through simultaneously
Three-dimensional flow field discovery is compared, the variation that inlet vane angle is 70 ° is so that movable vane cascade and splitterr vanes leading edge more match fluid
Mobility status avoids generating biggish vortex at impeller inlet, reduces profile loss.
The Numerical results comparison before and after splitterr vanes is added in table 1
In conclusion a kind of kW grade supercritical carbon dioxide radial turbine knot with splitterr vanes provided by the invention
Structure, can make the turbine modular construction in supercritical carbon dioxide Brayton cycle is compact, pneumatic efficiency is high, energy loss is small,
Operational safety has extensive future in engineering applications.
Claims (7)
1. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes, which is characterized in that including spiral case (1)
And setting is in the stator blade leaf grating (2), movable vane cascade (3) and splitterr vanes (4) of inner spiral casing (1)；Wherein,
Splitterr vanes (4) are mounted between two neighboring movable vane cascade (3), form stator blade between two neighboring stator blade leaf grating (2)
Leaf grating runner (5) forms movable vane cascade runner (6) between movable vane cascade (3) and splitterr vanes (4)；When work, overcritical dioxy
Change carbon working medium to be entered by spiral case (1), by spiral case (1) uniform blasting into stator blade leaf grating runner (5), working medium is in stator blade leaf grating runner
(5) pressure gradually decreases in, and flow velocity is gradually increased, and subsequently enters in movable vane cascade runner (6), in movable vane cascade runner (6),
Supercritical carbon dioxide working medium pushes impeller to rotate output work, finally along axial discharge.
2. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes according to claim 1,
It is characterized in that, the carbon dioxide working medium state at any one place is in supercriticality, i.e. temperature in the radial turbine structure
Higher than 31.1 DEG C, pressure is higher than 7.4MPa.
3. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes according to claim 1,
It is characterized in that, which is 20000-50000rpm, power 200-300kW, flow 4-8kg/s, expansion
Than for 1.5-2, inlet temperature is 500-600 DEG C.
4. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes according to claim 1,
It is characterized in that, the import geometry angle of movable vane cascade (3) and splitterr vanes (4) is 70 °.
5. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes according to claim 1,
It is characterized in that, splitterr vanes (4) are d=0.5s at a distance from movable vane cascade (3) suction surface and pressure face, and wherein s is movable vane
The pitch of leaf grating.
6. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes according to claim 1,
It is characterized in that, splitterr vanes (4) use the chord length at blade root for lb=0.6l, the chord length l at splitterr vanes leaf topt=0.4l,
Middle l is movable vane cascade chord length.
7. a kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes according to claim 1,
It is characterized in that, wall surface is all made of multistage involute composition inside and outside spiral case (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770590.9A CN110469369A (en) | 2019-08-20 | 2019-08-20 | A kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770590.9A CN110469369A (en) | 2019-08-20 | 2019-08-20 | A kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes |
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| Publication Number | Publication Date |
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| CN110469369A true CN110469369A (en) | 2019-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910770590.9A Pending CN110469369A (en) | 2019-08-20 | 2019-08-20 | A kind of kW grade supercritical carbon dioxide radial turbine structure with splitterr vanes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116796459A (en) * | 2023-06-20 | 2023-09-22 | 东南大学溧阳研究院 | Radial turbine design method with splitter blades applied to turbocharger |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1400399A (en) * | 2002-08-01 | 2003-03-05 | 孙敏超 | Small-type radial-flow or mixed-flow turbo supercharger |
| CN101915126A (en) * | 2010-06-04 | 2010-12-15 | 清华大学 | Tandem blade type mixed-flow or radial-flow turbine |
| CN102251811A (en) * | 2011-07-13 | 2011-11-23 | 哈尔滨工程大学 | Radial flow type turbine with splitter blade |
| CN103939148A (en) * | 2014-04-28 | 2014-07-23 | 哈尔滨工程大学 | Radial flow turbine with multiple splitter blades |
| CN105937415A (en) * | 2016-06-08 | 2016-09-14 | 西安交通大学 | Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow |
| CN109519225A (en) * | 2018-11-07 | 2019-03-26 | 西安交通大学 | A kind of radial-inward-flow turbine device with damping and sealing structure |
-
2019
- 2019-08-20 CN CN201910770590.9A patent/CN110469369A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1400399A (en) * | 2002-08-01 | 2003-03-05 | 孙敏超 | Small-type radial-flow or mixed-flow turbo supercharger |
| CN101915126A (en) * | 2010-06-04 | 2010-12-15 | 清华大学 | Tandem blade type mixed-flow or radial-flow turbine |
| CN102251811A (en) * | 2011-07-13 | 2011-11-23 | 哈尔滨工程大学 | Radial flow type turbine with splitter blade |
| CN103939148A (en) * | 2014-04-28 | 2014-07-23 | 哈尔滨工程大学 | Radial flow turbine with multiple splitter blades |
| CN105937415A (en) * | 2016-06-08 | 2016-09-14 | 西安交通大学 | Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow |
| CN109519225A (en) * | 2018-11-07 | 2019-03-26 | 西安交通大学 | A kind of radial-inward-flow turbine device with damping and sealing structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116796459A (en) * | 2023-06-20 | 2023-09-22 | 东南大学溧阳研究院 | Radial turbine design method with splitter blades applied to turbocharger |
| CN116796459B (en) * | 2023-06-20 | 2023-12-08 | 东南大学溧阳研究院 | Radial turbine design method with splitter blades applied to turbocharger |
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Application publication date: 20191119 |
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| RJ01 | Rejection of invention patent application after publication |