CN102280801A - Design method of cooler used for heat capacity type glass laser - Google Patents
Design method of cooler used for heat capacity type glass laser Download PDFInfo
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- CN102280801A CN102280801A CN 201110183600 CN201110183600A CN102280801A CN 102280801 A CN102280801 A CN 102280801A CN 201110183600 CN201110183600 CN 201110183600 CN 201110183600 A CN201110183600 A CN 201110183600A CN 102280801 A CN102280801 A CN 102280801A
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Abstract
The invention discloses a design method of cooler used for heat capacity type glass laser. According to the design method provided in the invention, according to an average pumping energy and a repetition rate of each pumping lamp, a total heat power of all pumping lamps in a independent cooling unit is obtained; and then, on the basis of a temperature rise of cooling water and the total heat power, a water flow of the cooling water and a volume of a water tank are obtained; at last, a cooling cavity of a cooler can be designed according to the water flow of the cooling water and a water tank is designed according to the volume of the water tank. Therefore, the cooler, which is obtained by the above-mentioned design method, has a good cooling effect on a pulsed-xenon lamp. Besides, the cooler has a small volume and is portable as well as the cooling water can be used in circulation, so the cooler is suitable for application in a field environment. Moreover, during a working gap of the heat capacity type glass laser, with regard to the temperature rise of the cooling water in the cooler, an available refrigerator can be used to transferring heat in the cooling water of the cooler.
Description
Technical field
The present invention relates to a kind of heat capacity type amorphous laser, especially relate to a kind of method for designing that is used for the cooler of heat capacity type amorphous laser.
Background technology
The exportable high-average power laser of heat capacity type neodymium glass laser in heat capacity type (the being discontinuous) amorphous laser, laser output pulse energy kJ (kilojoule), repetition rate 10Hz, average power myriawatt, peak power can reach more than the megawatt.Pumping source (generally adopting xenon flash lamp) in heat capacity type (bar-shaped, sheet or the lath) neodymium glass laser is worked in certain temperature range and just can be made laser have output characteristic preferably, especially the working temperature of some xenon flash lamp requires between 50～80 °, but the heat capacity type neodymium glass laser is in real work, the energy that its pumping source produces often makes its temperature exceed its operating temperature range, this has not only influenced the output characteristic of laser, and has limited the stream time of laser.The heat capacity type neodymium glass laser adopts cooling system paired pulses xenon lamp to cool off usually, but bulky, the complex structure of existing cooling system, and the cooling effect of paired pulses xenon lamp neither be very desirable, directly influenced the output characteristic of laser.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for designing that is used for the cooler of heat capacity type amorphous laser, and the cooler paired pulses xenon lamp that this method for designing design obtains has favorable cooling effect.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of method for designing that is used for the cooler of heat capacity type amorphous laser may further comprise the steps:
1. according to the average pump energy and the repetition rate of each pumping lamp in each the independent cooling unit mainly formed by n pumping lamp in the heat capacity type amorphous laser, calculate total heating power of all pumping lamps in each independent cooling unit, be designated as Q
0, Q
0=0.4 * E
In* f * n (J/S), wherein, E
InRepresent the average pump energy of each pumping lamp, f represents the repetition rate of each pumping lamp, n 〉=1;
2. making the temperature rise of cooling water when work in the cooling cavity that is arranged at the outer cooler of each independent cooling unit is Δ T, according to total heating power Q of all pumping lamps in each independent cooling unit
0Calculate temperature rise when being no more than Δ T, each second cooler the cooling cavity in the discharge of cooling water, be designated as m,
3. according to total heating power Q of all pumping lamps in each independent cooling unit
0With cooling water in the cooling cavity of the cooler temperature rise Δ T when the work, calculate the volume with the water tank that cools off the cooler that cavity is connected, be designated as M,
Wherein, N represents the number of the independent cooling unit in the heat capacity type amorphous laser,
Total number of pumping lamp in the N ' expression heat capacity type amorphous laser, n represents the number of the pumping lamp that comprises in each independent cooling unit, τ represents the running time of heat capacity type amorphous laser.
When described heat capacity type amorphous laser is bar-shaped amorphous laser of heat capacity type or heat capacity type foliated glass laser, each described independent cooling unit only is made up of 1 pumping lamp, described cooling cavity is to be sheathed on the outer cooling water pipe of pumping lamp, described step 2. after, according to the outer radius of pumping lamp, the thickness of cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe and the flow velocity of cooling water, calculate the inside radius of cooling water pipe, be designated as (a+ γ)
Wherein, a represents the outer radius of pumping lamp, and γ represents the thickness of the cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe, and V represents the flow velocity of cooling water.
When described heat capacity type amorphous laser was heat capacity type lath amorphous laser, described cooling cavity was mainly by the rectangular light concentrator with mix the cerium quartz glass plate and constitute.
Compared with prior art, the invention has the advantages that: by the average pump energy and the repetition rate of pumping lamp, obtain total heating power of all pumping lamps in the independent cooling unit, temperature rise and total heating power according to cooling water obtains the discharge of cooling water and the volume of water tank then, can design the cooling cavity of cooler at last according to the discharge of cooling water, reach volume design water tank, design the cooler paired pulses xenon lamp that obtains like this and have favorable cooling effect according to water tank; The cooler volume is little, light, and cooling water can be recycled, and is applicable to cross-country environment; The temperature rise of water can be gone out the transfer of heat in the cooling water in the cooler with existing refrigerator in the heat capacity type amorphous laser working clearance in the cooler.
Description of drawings
Fig. 1 is the schematic diagram of the independent cooling unit of bar-shaped amorphous laser of heat capacity type or heat capacity type foliated glass laser;
Fig. 2 is the schematic diagram of the independent cooling unit of heat capacity type lath amorphous laser.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one:
A kind of method for designing that is used for the cooler of the bar-shaped neodymium glass laser of heat capacity type, it may further comprise the steps:
1. set the bar-shaped neodymium glass laser of 4 pumping lamps (N '=4) pumping heat capacity type, each independent cooling unit in the bar-shaped neodymium glass laser of heat capacity type mainly is made up of 1 pumping lamp 11 as shown in Figure 1, cooler comprises cooling cavity and the water tank that is connected with the cooling cavity, the cooling cavity is a cooling water pipe 12, and cooling water pipe 12 is provided with water inlet water nozzle 13 and the water outlet water nozzle 14 that is connected with water tank.According to the average pump energy and the repetition rate of the pumping lamp in each independent cooling unit, calculate total heating power of all pumping lamps in each independent cooling unit, be designated as Q
0, Q
0=0.4 * E
In* f * n (J/S), wherein, E
InRepresent the average pump energy of each pumping lamp, f represents the repetition rate of each pumping lamp, n=1.At this, establish the average pump energy E of each pumping lamp
In=17KJ, the repetition rate f=5Hz of each pumping lamp is like this according to calculating Q
0=0.4 * 17KJ * 5Hz * 1=34KW=34KJ/S=34 * 10
3J/S.
2. making the temperature rise of cooling water when work in the cooling cavity that is arranged at the outer cooler of each independent cooling unit is Δ T, according to total heating power Q of all pumping lamps in each independent cooling unit
0Calculate temperature rise when being no more than Δ T, each second cooler the cooling cavity in the discharge of cooling water, be designated as m,
At this, the cooling cavity is to be sheathed on the outer cooling water pipe of pumping lamp, suppose T=10 ℃ of the temperature rise Δ of cooling water when working, the discharge that then can calculate the cooling water in the cooling water pipe more than or equal to
As desirable m=50 (rise/minute).
According to the outer radius of pumping lamp, the thickness of cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe and the flow velocity of cooling water, calculate the inside radius of cooling water pipe then, be designated as (a+ γ),
Wherein, a represents the outer radius of pumping lamp, and γ represents the thickness of the cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe, and V represents the flow velocity of cooling water.At this, establish the outer radius a=2cm of pumping lamp, the flow velocity V=150 (cm/s) of cooling water, m=816 (cm
3/ s), can calculate the inside radius of cooling water pipe
And the thickness γ ≈ 2.4-2 ≈ 0.4cm of the cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe, like this when actual design, can select for use overall diameter be 5.2cm, thickness of pipe wall be 0.2cm mix the cerium quartz ampoule as cooling water pipe.
3. according to total heating power Q of all pumping lamps in each independent cooling unit
0With the cooling cavity of cooler be the temperature rise Δ T of cooling water when the work in the cooling water pipe, calculate the volume with the water tank that cools off the cooler that cavity is connected, be designated as M,
Wherein, N represents the number of the independent cooling unit in the heat capacity type amorphous laser,
Total number of pumping lamp in the N ' expression heat capacity type amorphous laser, n represents the number of the pumping lamp that comprises in each independent cooling unit, τ represents the running time of heat capacity type amorphous laser.At this, suppose that τ running time of heat capacity type amorphous laser is 10S, then the volume of water tank
Rise, can select for use length to be respectively the water tank of 30cm, 30cm, 40cm during actual design, can calculate the close cooling water pipe in cross section and be connected according to the logical sectional area of water in the cooling water pipe with water tank.
Embodiment two:
Present embodiment and embodiment one are basic identical, and difference is that present embodiment is the method for designing that is used for the cooler of heat capacity type sheet neodymium glass laser, and its concrete steps are as follows:
1. set 4 pumping lamps (N '=4) pumping heat capacity type sheet neodymium glass laser, each independent cooling unit in the heat capacity type sheet neodymium glass laser mainly is made up of 1 pumping lamp 11 as shown in Figure 1, cooler comprises cooling cavity and the water tank that is connected with the cooling cavity, the cooling cavity is a cooling water pipe 12, and cooling water pipe 12 is provided with water inlet water nozzle 13 and the water outlet water nozzle 14 that is connected with water tank.According to the average pump energy and the repetition rate of the pumping lamp in each independent cooling unit, calculate total heating power of all pumping lamps in each independent cooling unit, be designated as Q
0, Q
0=0.4 * E
In* f * n (J/S), wherein, E
InRepresent the average pump energy of each pumping lamp, f represents the repetition rate of each pumping lamp, n=1.At this, establish the average pump energy E of each pumping lamp
In=11KJ, the repetition rate f=5Hz of each pumping lamp is like this according to calculating Q
0=0.4 * 11KJ * 5Hz * 1=22KW=22KJ/S=22 * 10
3J/S.
2. making the temperature rise of cooling water when work in the cooling cavity that is arranged at the outer cooler of each independent cooling unit is Δ T, according to total heating power Q of all pumping lamps in each independent cooling unit
0Calculate temperature rise when being no more than Δ T, each second cooler the cooling cavity in the discharge of cooling water, be designated as m,
At this, the cooling cavity is to be sheathed on the outer cooling water pipe of pumping lamp, suppose T=10 ℃ of the temperature rise Δ of cooling water when working, the discharge that then can calculate the cooling water in the cooling water pipe more than or equal to
As desirable m=530 (cm
3/ s) ≈ 32 (rise/minute).
According to the outer radius of pumping lamp, the thickness of cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe and the flow velocity of cooling water, calculate the inside radius of cooling water pipe then, be designated as (a+ γ),
Wherein, a represents the outer radius of pumping lamp, and γ represents the thickness of the cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe, and V represents the flow velocity of cooling water.At this, establish the outer radius a=2cm of pumping lamp, the flow velocity V=150 (cm/s) of cooling water, m=530 (cm
3/ S), can calculate the inside radius of cooling water pipe
Like this when actual design, can select for use wall thickness 0.2cm, overall diameter be 5cm mix the cerium quartz ampoule as cooling water pipe.
3. according to total heating power Q of all pumping lamps in each independent cooling unit
0With the cooling cavity of cooler be the temperature rise Δ T of cooling water when the work in the cooling water pipe, calculate the volume with the water tank that cools off the cooler that cavity is connected, be designated as M,
Wherein, N represents the number of the independent cooling unit in the heat capacity type amorphous laser,
Total number of pumping lamp in the N ' expression heat capacity type amorphous laser, n represents the number of the pumping lamp that comprises in each independent cooling unit, τ represents the running time of heat capacity type amorphous laser.At this, suppose that τ running time of heat capacity type amorphous laser is 10S, then the volume of water tank
Rise, can select for use length to be respectively the water tank of 25cm, 25cm, 34cm during actual design, can calculate the close cooling water pipe in cross section and be connected according to the logical sectional area of water in the cooling water pipe with water tank.
If selecting volume for use is 30 liters water tank, then the cooling cavity of cooler is T=7 ℃ of the temperature rise Δ of cooling water when end-of-job in the cooling water pipe.
Embodiment three:
Present embodiment is the method for designing that is used for the cooler of heat capacity type lath neodymium glass laser, and its concrete steps are as follows:
1. set 10 pumping lamp pumping heat capacity type lath neodymium glass lasers, each independent cooling unit in the heat capacity type lath neodymium glass laser is made up of 5 pumping lamps 22 as shown in Figure 2, totally 2 independent cooling units, cooler comprises cooling cavity and the water tank that is connected with the cooling cavity, the cooling cavity is that the cerium quartz glass plate 23 of mixing of 0.3cm constitutes by silver-plated rectangular light concentrator 21 and thickness mainly, silver-plated rectangular light concentrator 21 and mix between the cerium quartz glass plate 23 to be connected and sealed with glue and constitute a cooling cavity that is used to hold cooling water, rectangular light concentrator 21 is provided with water inlet water nozzle 24 and the water outlet water nozzle 25 that is connected with water tank.According to the average pump energy and the repetition rate of the pumping lamp in each independent cooling unit, calculate total heating power of all pumping lamps in each independent cooling unit, be designated as Q
0, Q
0=0.4 * E
In* f * n (J/S), wherein, E
InRepresent the average pump energy of each pumping lamp, f represents the repetition rate of each pumping lamp, n=5.If the average pump energy E of each pumping lamp
In=2KJ, the repetition rate f=5Hz of each pumping lamp is like this according to calculating Q
0=0.4 * 2KJ * 5Hz * 5=20KW=20KJ/S=20 * 10
3J/S.
2. making the temperature rise of cooling water when work in the cooling cavity that is arranged at the outer cooler of each independent cooling unit is Δ T, according to total heating power Q of all pumping lamps in each independent cooling unit
0Calculate temperature rise when being no more than Δ T, each second cooler the cooling cavity in the discharge of cooling water, be designated as m,
At this, suppose cooling water T=10 ℃ of the temperature rise Δ in when work, the discharge that then can calculate the cooling water in the cooling water pipe more than or equal to
As desirable m=600 (cm
3/ S)=36 (rise/minute).
3. according to total heating power Q of all pumping lamps in each independent cooling unit
0With the cooling cavity of cooler be the temperature rise Δ T of cooling water when the work in the cooling water pipe, calculate the volume with the water tank that cools off the cooler that cavity is connected, be designated as M,
Wherein, N represents the number of the independent cooling unit in the heat capacity type amorphous laser,
Total number of pumping lamp in the N ' expression heat capacity type amorphous laser, n represents the number of the pumping lamp that comprises in each independent cooling unit, τ represents the running time of heat capacity type amorphous laser.At this, suppose that τ running time of heat capacity type amorphous laser is 10S, then the volume of the water tank of each independent cooling unit correspondence
Rise, can select volume during actual design for use is 10 liters water tank, the total measurement (volume) of the water tank of two independent cooling units should be 20 liters, if the flow velocity of cooling water still is 150 (cm/s), flow obtains the logical sectional area of water in the cooling water pipe divided by flow velocity, thereby the water inlet water nozzle that definite each independent cooling unit is connected and the interior diameter of water outlet water nozzle are about 2cm.
If selecting total measurement (volume) for use is 30 liters water tank, then the cooling cavity of cooler is T=7 ℃ of the temperature rise Δ of cooling water when end-of-job in the cooling water pipe.
Claims (3)
1. method for designing that is used for the cooler of heat capacity type amorphous laser is characterized in that may further comprise the steps:
1. according to the average pump energy and the repetition rate of each pumping lamp in each the independent cooling unit mainly formed by n pumping lamp in the heat capacity type amorphous laser, calculate total heating power of all pumping lamps in each independent cooling unit, be designated as Q
0, Q
0=0.4 * E
In* f * n (J/S), wherein, E
InRepresent the average pump energy of each pumping lamp, f represents the repetition rate of each pumping lamp, n 〉=1;
2. making the temperature rise of cooling water when work in the cooling cavity that is arranged at the outer cooler of each independent cooling unit is Δ T, according to total heating power Q of all pumping lamps in each independent cooling unit
0Calculate temperature rise when being no more than Δ T, each second cooler the cooling cavity in the discharge of cooling water, be designated as m,
3. according to total heating power Q of all pumping lamps in each independent cooling unit
0With cooling water in the cooling cavity of the cooler temperature rise Δ T when the work, calculate the volume with the water tank that cools off the cooler that cavity is connected, be designated as M,
Wherein, N represents the number of the independent cooling unit in the heat capacity type amorphous laser,
Total number of pumping lamp in the N ' expression heat capacity type amorphous laser, n represents the number of the pumping lamp that comprises in each independent cooling unit, τ represents the running time of heat capacity type amorphous laser.
2. a kind of method for designing that is used for the cooler of heat capacity type amorphous laser according to claim 1, when it is characterized in that described heat capacity type amorphous laser is bar-shaped amorphous laser of heat capacity type or heat capacity type foliated glass laser, each described independent cooling unit only is made up of 1 pumping lamp, described cooling cavity is to be sheathed on the outer cooling water pipe of pumping lamp, described step 2. after, outer radius according to pumping lamp, the thickness of the cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe and the flow velocity of cooling water, calculate the inside radius of cooling water pipe, be designated as (a+ γ)
Wherein, a represents the outer radius of pumping lamp, and γ represents the thickness of the cooling water layer between the inwall of the outer wall of pumping lamp and cooling water pipe, and V represents the flow velocity of cooling water.
3. a kind of method for designing that is used for the cooler of heat capacity type amorphous laser according to claim 1, when it is characterized in that described heat capacity type amorphous laser is heat capacity type lath amorphous laser, described cooling cavity is mainly by the rectangular light concentrator with mix the cerium quartz glass plate and constitute.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217084A (en) * | 2017-06-30 | 2019-01-15 | 中国科学院上海光学精密机械研究所 | The control method and high energy repetition capacitance laser of high energy repetition capacitance laser |
| CN110571632A (en) * | 2019-09-30 | 2019-12-13 | 华中科技大学 | phase-change cooling heat capacity type rotating laser |
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|---|---|---|---|---|
| US4291282A (en) * | 1979-09-07 | 1981-09-22 | The Research Foundation Of The City University Of New York | Stabilized pulse producing mode locked laser system |
| CN1905292A (en) * | 2006-07-26 | 2007-01-31 | 中国科学院上海光学精密机械研究所 | Lath laser for implementing Z shape light path by reflecting glass |
| CN101202410A (en) * | 2007-11-22 | 2008-06-18 | 宁波大学 | Heat capacity type neodymium glass flaky laser |
| JP2009280452A (en) * | 2008-05-23 | 2009-12-03 | Central Glass Co Ltd | Glass substrate and method for producing the same |
| CN201868726U (en) * | 2009-07-13 | 2011-06-15 | 北京理工大学 | Mixed cooling laser diode pumping slab laser |
-
2011
- 2011-07-01 CN CN 201110183600 patent/CN102280801B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4291282A (en) * | 1979-09-07 | 1981-09-22 | The Research Foundation Of The City University Of New York | Stabilized pulse producing mode locked laser system |
| CN1905292A (en) * | 2006-07-26 | 2007-01-31 | 中国科学院上海光学精密机械研究所 | Lath laser for implementing Z shape light path by reflecting glass |
| CN101202410A (en) * | 2007-11-22 | 2008-06-18 | 宁波大学 | Heat capacity type neodymium glass flaky laser |
| JP2009280452A (en) * | 2008-05-23 | 2009-12-03 | Central Glass Co Ltd | Glass substrate and method for producing the same |
| CN201868726U (en) * | 2009-07-13 | 2011-06-15 | 北京理工大学 | Mixed cooling laser diode pumping slab laser |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217084A (en) * | 2017-06-30 | 2019-01-15 | 中国科学院上海光学精密机械研究所 | The control method and high energy repetition capacitance laser of high energy repetition capacitance laser |
| CN109217084B (en) * | 2017-06-30 | 2020-12-04 | 中国科学院上海光学精密机械研究所 | Control method of high-energy repetition frequency heat capacity laser and high-energy repetition frequency heat capacity laser |
| CN110571632A (en) * | 2019-09-30 | 2019-12-13 | 华中科技大学 | phase-change cooling heat capacity type rotating laser |
| CN110571632B (en) * | 2019-09-30 | 2020-12-08 | 华中科技大学 | Phase-change cooling heat capacity type rotating laser |
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