CN105065341A - Ejector of which mixing cavity is in parallel connection with bypasses - Google Patents
Ejector of which mixing cavity is in parallel connection with bypasses Download PDFInfo
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- CN105065341A CN105065341A CN201510416303.6A CN201510416303A CN105065341A CN 105065341 A CN105065341 A CN 105065341A CN 201510416303 A CN201510416303 A CN 201510416303A CN 105065341 A CN105065341 A CN 105065341A
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- bypasses
- mixing cavity
- bypass
- driving fluid
- mixing chamber
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Abstract
The invention discloses an ejector of which a mixing cavity is in parallel connection with bypasses. The ejector comprises a spray nozzle, a driving fluid air inlet chamber, the mixing cavity, a diffusion chamber and the bypasses, wherein the mixing cavity is in parallel connection with the multiple bypasses; the bypasses are uniformly distributed in the circumferential direction of the mixing cavity; the inlet ends of the bypasses are communicated with the driving fluid air inlet chamber; the outlet ends of the bypasses are communicated with the throat of the mixing cavity; check valves are arranged on the bypasses; part of driving fluid enters the mixing cavity through an annular flow channel between the spray nozzle and the mixing cavity; the other part of driving fluid enters the mixing cavity through the bypasses. According to the ejector of which the mixing cavity is in parallel connection with the bypasses, the principle that bypass hole basically does not affect upstream flow fields is adopted, accordingly the flow of the driving fluid pumped through the annular flow channel is basically not changed; the flow of the driving fluid sucked through the bypasses is increased so that the total flow of the driving fluid is increased. The flow of a working fluid is kept unchanged, so that the ejecting performance is improved. Moreover, when backflow occurs to the bypasses, the check valves can automatically remove influences of the bypasses.
Description
Technical field
The present invention relates to the sparger of a kind of mixing chamber bypass in parallel, belong to energy and power engineering technical field.
Background technique
Sparger is a kind of mixing increasing apparatus, has the advantages such as structure is simple, easy to operate, reliable.And sparger can utilize low-grade energy, realizing the cascade utilization of energy, is a kind of energy-conserving and emission-cutting technology, is widely used in multiple fields such as electric power, petrochemical industry, refrigeration, Aero-Space and bio-pharmaceuticals.Improve the performance of sparger, the overall system efficiency of associated industrial field can be promoted.Therefore the service behaviour improving sparger has important practical significance.
Sparger mixes increasing apparatus as one, and inject ratio ω, usually used as the important indicator weighing its injection performance, is defined as:
Wherein, m
sfor the mass flow rate of driving fluid, kg/s; m
pfor the mass flow rate of working fluid, kg/s.
Can by being optimized the injection performance improving sparger to Operational Limits and structural parameter, Operational Limits is often relevant with the working state of entire system, optimizable leeway is less, and therefore, being optimized the structure of sparger is the main path improving sparger injection performance.
Summary of the invention
The invention provides the sparger of a kind of mixing chamber bypass in parallel, described sparger utilizes the bypass in parallel with mixing chamber to increase driving fluid mass flow rate, and compared with ordinary injectors, the injection performance of described sparger is greatly improved.
In order to achieve the above object, the technical solution used in the present invention is:
A sparger for mixing chamber bypass in parallel, described sparger comprises nozzle, driving fluid suction chamber, mixing chamber, diffusion room and bypass; Wherein, mixing chamber some bypasses in parallel, the entrance point of bypass is communicated with driving fluid suction chamber, and the outlet end of bypass is communicated with mixing chamber throat, and arranges valve in bypass.
In above-mentioned sparger, described bypass is uniformly distributed along mixing chamber circumference.
In above-mentioned sparger, the valve in described bypass adopts safety check.
Compared with prior art, the present invention has the following advantages:
1, in the present invention, the selection of other hole site is substantially not impact as principle to upstream flow field, the flow (m of the driving fluid therefore aspirated by ring runner
s1) substantially remain unchanged, and add the flow (m of the driving fluid sucked by bypass
s2), therefore the total amount of driving fluid increases (m
s).Again because the flow (m of the working fluid by nozzle
p) substantially remain unchanged, so the injection performance (m of sparger
s/ m
p) be improved.
2, in the present invention, bypass is furnished with safety check, when adverse current appears in bypass, safety check cuts out automatically, the impact of excision bypass.
Accompanying drawing explanation
Fig. 1 is the emitter construction schematic diagram of a kind of mixing chamber of the present invention bypass in parallel.
In figure, each mark is as follows: 1 is nozzle, and 2 is driving fluid suction chamber, and 3 is mixing chamber, and 4 is diffusion room, and 5 is bypass, and 6 is other hole, and 7 is valve.
Fig. 2 is the result of carrying out numerical simulation study for the sparger of a kind of mixing chamber of the present invention bypass in parallel.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details, but the present invention is not limited to following examples.
As shown in Figure 1, sparger provided by the invention comprises nozzle 1, driving fluid suction chamber 2, mixing chamber 3, diffusion room 4 and bypass 5; Wherein, mixing chamber 3 some bypasses 5 in parallel, bypass 5 is evenly arranged along mixing chamber 3 circumference, and the entrance point of bypass 5 is communicated with driving fluid suction chamber 2, and the outlet end of bypass 5 is communicated with mixing chamber 3 throat, and in bypass, arrange safety check 7.
For sparger shown in Fig. 1, the working procedure of sparger provided by the invention is: working fluid enters mixing chamber 3 after nozzle 1 accelerates to become supersonic airstream, part driving fluid is inhaled into mixing chamber 3 by the ring runner between nozzle 1 and mixing chamber 3, and fully mixes in mixing chamber 3 throat with working fluid; Another driving fluid enters mixing chamber 3 throat by bypass 5, and converges mutually with the fluid-mixing of upstream, enters diffusion room 4 and carry out reduction of speed boosting after converging.
The determination of other position, hole 6 does not substantially impact as principle to upstream flow field with air inlet, therefore passes through the flow (m of the driving fluid that the ring runner between nozzle 1 and mixing chamber 3 aspirates
s1) substantially remain unchanged, and add the flow (m of the driving fluid sucked by bypass 5
s2), the therefore total discharge (m of driving fluid
s) increase.Again because the flow (m of the working fluid by nozzle 1
p) substantially remain unchanged, so the injection performance (m of sparger
s/ m
p) be improved.In addition, when adverse current appears in bypass 5, safety check 7 cuts out automatically, the impact of excision bypass.
To the invention provides a kind of mixing chamber of Fig. 1 sparger of bypass in parallel and the sparger not with other hole carries out numerical simulation comparative study, wherein the main structure parameters of two kinds of spargers is: nozzle throat diameter d=10.2mm, sparger mixing chamber throat diameter D=14.7mm, mixing chamber throat length L=80mm, other hole site X
p=68mm.Simulated condition is: working fluid pressure 0.3 ~ 0.45MPa; Citation jet body pressure is 0.2 ~ 0.6MPa; Back-pressure is 0.02 ~ 0.24MPa.
Model is set up and is arranged: adopt Gambit2.4.6 and FLUENT6.3.26 to carry out modeling and analog computation respectively respectively.Carry out modeling by three-dimensional structure, initialization grid is 900,000 structural grid, and after carrying out the adaptive grid encryption based on pressure distribution, grid adds up to 1250,000.Turbulence model adopts RNGk-ε model, and enhancement mode Wall-function is used for processing the calculating in turbulent boundary layer.Working fluid and driving fluid entrance are all set to pressure entrance boundary conditions, and fluid-mixing outlet is set to pressure export boundary conditions.Adopt Second-order Up-wind form to carry out discrete processes to equation, and adopt SIMPLEC algorithm to solve.This model is verified by experiment, to the error of calculations of inject ratio within 10%, and reliable results.
Comparing result as shown in Figure 2, can be learnt by this figure, when using sparger of the present invention, due to the mass flow rate (m of driving fluid
p) substantially remain unchanged, the mass flow rate (m of driving fluid
s) increase, therefore injection performance (m
s/ m
p, and inject ratio) be improved.And when adverse current appears in bypass, safety check cuts out automatically, the impact of excision bypass, can make again the sparger that inject ratio equals not with bypass.
The various embodiments described above are only for illustration of the present invention, and wherein the structure, Placement etc. of each parts all can change to some extent, and every equivalent variations of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (3)
1. a sparger for mixing chamber bypass in parallel, is characterized in that: described sparger comprises nozzle (1), driving fluid suction chamber (2), mixing chamber (3), diffusion room (4) and bypass (5); Wherein, mixing chamber (3) several bypasses (5) in parallel, the entrance point of bypass (5) is communicated with driving fluid suction chamber (2), the outlet end of bypass (5) is communicated with mixing chamber (3) throat, i.e. other hole (6), and in bypass, arrange valve (7).
2. the sparger of a kind of mixing chamber according to claim 1 bypass in parallel, is characterized in that: bypass (5) is uniformly distributed along mixing chamber (3) circumference.
3. the sparger of a kind of mixing chamber according to claim 1 bypass in parallel, is characterized in that: the valve (7) in bypass adopts safety check.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416303.6A CN105065341A (en) | 2015-07-15 | 2015-07-15 | Ejector of which mixing cavity is in parallel connection with bypasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416303.6A CN105065341A (en) | 2015-07-15 | 2015-07-15 | Ejector of which mixing cavity is in parallel connection with bypasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105065341A true CN105065341A (en) | 2015-11-18 |
Family
ID=54494813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510416303.6A Pending CN105065341A (en) | 2015-07-15 | 2015-07-15 | Ejector of which mixing cavity is in parallel connection with bypasses |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537335A (en) * | 2017-10-10 | 2018-01-05 | 中煤科工清洁能源股份有限公司 | A kind of nozzle, blender and feeding system |
| WO2019146322A1 (en) * | 2018-01-24 | 2019-08-01 | 株式会社デンソー | Ejector |
| KR20190126931A (en) * | 2017-03-27 | 2019-11-12 | 지이-히타치 뉴클리어 에너지 어메리카스 엘엘씨 | Mixed water spurs nozzles and how to use them in reactors |
| CN113335016A (en) * | 2021-05-08 | 2021-09-03 | 西安交通大学 | Injector module for new energy vehicle and transcritical CO2Heat pump air conditioning system and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190126931A (en) * | 2017-03-27 | 2019-11-12 | 지이-히타치 뉴클리어 에너지 어메리카스 엘엘씨 | Mixed water spurs nozzles and how to use them in reactors |
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| WO2019146322A1 (en) * | 2018-01-24 | 2019-08-01 | 株式会社デンソー | Ejector |
| CN113335016A (en) * | 2021-05-08 | 2021-09-03 | 西安交通大学 | Injector module for new energy vehicle and transcritical CO2Heat pump air conditioning system and method |
| CN113335016B (en) * | 2021-05-08 | 2022-10-25 | 西安交通大学 | Injector module and transcritical CO for new energy vehicle 2 Heat pump air conditioning system and method |
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Application publication date: 20151118 |