JPH0480596A - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH0480596A JPH0480596A JP19303690A JP19303690A JPH0480596A JP H0480596 A JPH0480596 A JP H0480596A JP 19303690 A JP19303690 A JP 19303690A JP 19303690 A JP19303690 A JP 19303690A JP H0480596 A JPH0480596 A JP H0480596A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- resonance
- sound
- heat
- acoustic field
- 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.)
- Granted
Links
- 239000011358 absorbing material Substances 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000005192 partition Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ボイラ、ガスヒータ等の熱交換器に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to heat exchangers such as boilers and gas heaters.
第２図に示すように、従来のガス流れに直角方向に１か
つ、互いに平行をなして配置され友複数の熱交換管１か
ら成る管群を内蔵する熱交換器においては、管群の中で
熱交換器１から発生する放出渦２の周波数と熱交換器内
の音場の周波数の一致（共鳴）を避けるため、熱交換器
内にガス流れ方向、かつ熱交換管１の軸方向に配置され
九複数の仕切板４３〜４６１に挿入し・音場の固有周波
敷金上昇させている。As shown in Fig. 2, in a conventional heat exchanger that incorporates a tube group consisting of a plurality of heat exchange tubes 1 arranged perpendicular to the gas flow and parallel to each other, the tube group is In order to avoid coincidence (resonance) between the frequency of the shedding vortex 2 generated from the heat exchanger 1 and the frequency of the sound field inside the heat exchanger, there is a They are arranged and inserted into nine plurality of partition plates 43 to 461 to raise the natural frequency deposit of the sound field.
前記の従来の熱交換において、管群を流速Ｖをもつ流れ
が通過すると、熱交換管１からはハル数）の周波数をも
つ渦２が放出される。この放出渦２の周波数ｆ８が熱交
換器の幅して決定ｎ ＝１ ＊ ２ ｅ ３ ｔ・・・
・−）と一致すると、幅方向に音場の共鳴が発生し、騒
音が問題となる。In the conventional heat exchange described above, when a flow having a flow velocity V passes through the tube group, a vortex 2 having a frequency equal to Hull number is emitted from the heat exchange tube 1. The frequency f8 of this shedding vortex 2 is determined by the width of the heat exchanger n = 1 * 2 e 3 t...
-), resonance of the sound field occurs in the width direction, and noise becomes a problem.
従来はこの共鳴を避ける次めに、前記のように複数の仕
切板４３１〜４６ｔ−挿入して音場の最間隔）を放出渦
の周波数ｆＳより高くなるようＫしてい友。この場合に
は、熱交換器内の流体の流速Ｖが速くな）放出渦の周波
数が増大すると、仕切板の枚数−増加させ、仕切板の間
の間隔を減小させなければならないという問題点があっ
た。Conventionally, to avoid this resonance, as described above, a plurality of partition plates 431 to 46t (the closest distance in the sound field) is inserted so that the frequency is higher than the frequency fS of the emitted vortex. In this case, if the frequency of the shedding vortex increases (as the flow velocity V of the fluid in the heat exchanger increases), there is a problem that the number of partition plates must be increased and the interval between the partition plates must be decreased. Ta.
本発明は、従来の熱交換器のもつ以上の問題点を解決し
ようとするものである。The present invention seeks to overcome the problems associated with conventional heat exchangers.
本発明は、流れに直角方向に、かつ、互いに平行ｔなし
て配置された複数の熱交換管からなる管ＩＩＰｆ：内蔵
した熱変換器において、同熱交換器内の音場の共鳴音波
長の鵜だけ熱交換器の壁面から熱交換器の内方へ間隔を
隔てゝ、ガス流れ方向に、かつ、熱交換管の軸方向に吸
音材を設置した。The present invention provides a tube IIPf consisting of a plurality of heat exchange tubes arranged in a direction perpendicular to the flow and parallel to each other. Sound-absorbing material was installed at a distance from the wall of the heat exchanger toward the inside of the heat exchanger, in the gas flow direction, and in the axial direction of the heat exchange tube.
吸音材の両面で生じる圧力差Δｐは吸音材の流れ抵抗Ｒ
と流体の粒子速度変動ｕ’に用いて次式で表わされる
△ｐ ” Ｒｕ ・・・（１）粒子速度
変動Ｕの値の大きな位置に吸音材を設置すれは吸音材両
面での圧力差△ｐが増大し、吸音材によるエネルギ吸収
が増大して、音場の共鳴の振幅が小さくなる。The pressure difference Δp generated on both sides of the sound absorbing material is the flow resistance R of the sound absorbing material.
△p'' Ru is expressed by the following formula using As p increases, the absorption of energy by the sound absorbing material increases and the amplitude of the resonance of the sound field decreases.
一方、音場が共鳴した状態での圧力変動ｐと粒子速度変
動Ｕは次式で表わさｎる。On the other hand, pressure fluctuation p and particle velocity fluctuation U when the sound field resonates are expressed by the following equations.
ｒｃｘ
ｕ ” ｕ 幽□ ・・・（３）
し
ただし、Ｘは音場の端部から幅方向にとっ念座標値、ｐ
ｏｅｕ＠は圧力、粒子速度の最大値、ｎは共鳴の次数。rcx u ” u yu□ ...(3)
However, X is a special coordinate value in the width direction from the edge of the sound field, p
oeu@ is the pressure, the maximum particle velocity, and n is the resonance order.
本発明では、熱交換器内の対象とする共鳴音から熱交換
器の内方へ間隔を隔てゝ、ガス流れ方向に、かつ熱交換
管の軸方向に吸音材が設置されているので、前記（３）
式の共鳴発生時の粒子速度変動Ｕが最大となり、従って
、前記（１）式の吸音材の両面で生ずる圧力差仲が最大
となり、熱交換管からの放出渦と熱交換器音場の共鳴の
発生時に最大の吸音効果が得られる。In the present invention, since the sound absorbing material is installed in the gas flow direction and in the axial direction of the heat exchange tube at a distance from the target resonance sound in the heat exchanger inward of the heat exchanger, (3)
The particle velocity fluctuation U when resonance occurs in the equation (1) becomes maximum, and therefore the pressure difference generated on both sides of the sound absorbing material in equation (1) becomes the maximum, causing resonance between the vortex emitted from the heat exchange tube and the heat exchanger sound field. The maximum sound absorption effect is obtained when
本発明の一実施例を、第１図によって説明する。 An embodiment of the present invention will be described with reference to FIG.
上下方向に筒状をなす熱交換器の上方から、矢印に示す
ように、流速Ｖのガスが熱交換器の側壁５と平行に導入
され、同熱交換器内には、ガスの流れ方向に直角に、か
つ互いに平行に配置された複数の熱交換管１からなる管
群が内蔵されている。管群を通過したガスはその方向を
変えて、矢印に示すように、はソ水平方向に熱交換器か
ら排出されるようになっている。また熱交換器の幅りで
決定される熱交換器内の対象とする音場の共鳴音波長の
楓だけ熱交換器の両方の側壁５からそれぞれ内方へ間隔
ｗｔ隔てゝ、ガス流れ方向に、かつ熱交換管１０軸方向
に平行に吸音材３ａ、３ｂが設置されている。Gas at a flow rate of V is introduced from above the vertically cylindrical heat exchanger parallel to the side wall 5 of the heat exchanger as shown by the arrow, and into the heat exchanger, gas is introduced in the direction of gas flow. A tube group consisting of a plurality of heat exchange tubes 1 arranged at right angles and parallel to each other is built-in. The gas that has passed through the tube group changes its direction and is discharged from the heat exchanger in a horizontal direction, as shown by the arrow. In addition, in the gas flow direction, the width of the heat exchanger is determined by the width of the heat exchanger. , and sound absorbing materials 3a and 3b are installed parallel to the axial direction of the heat exchange tube 10.
本実施例において、熱交換器内の音場が共鳴した状態に
おける粒子速度変動Ｕと圧力変動ｐは、「作用」欄に記
載した式（２）、 （，３）の通シであシ、これが！１
図中に示されている。In this example, the particle velocity fluctuation U and pressure fluctuation p in the state where the sound field in the heat exchanger resonates are the combination of equations (2) and (, 3) described in the "effect" column, This is! 1
Shown in the figure.
吸音材３ａ、３ｂは、前記のように、共鳴発生時の粒子
速度変動Ｕの最大となる側壁５から熱交換器内の音場の
共鳴音波長の鵜だけ離れ次位置に設けられているために
１熱交換管１からの放出渦２と熱交換器音場との共鳴が
発生してもこの吸音材３ａ、３ｂによって、最大の吸音
効果を得ることができる。As described above, the sound-absorbing materials 3a and 3b are provided at the next position away from the side wall 5 where the particle velocity fluctuation U at the time of resonance is maximum, by the distance of the resonant sound wave length of the sound field in the heat exchanger. Even if resonance occurs between the emitted vortex 2 from the heat exchange tube 1 and the heat exchanger sound field, the maximum sound absorption effect can be obtained by the sound absorbing materials 3a and 3b.
本発明では、吸音材を、熱変換器の壁面から内方へ熱交
換器内の音場の共鳴音波長の１／４だけ間隔を隔て＼ガ
スの流れ方向、かつ、熱交換管の軸方向に設置している
ために、熱交換管からの放出渦と熱交換器内音場の共鳴
が発生しても、吸音材によって最大の吸音効果が得られ
共鳴の振幅を小さくすることができる。In the present invention, the sound absorbing material is spaced inward from the wall surface of the heat exchanger by 1/4 of the resonant sound wave length of the sound field in the heat exchanger, in the gas flow direction and in the axial direction of the heat exchange tube. Because it is installed in the heat exchanger, even if resonance occurs between the vortices emitted from the heat exchange tubes and the sound field inside the heat exchanger, the sound-absorbing material can provide the maximum sound-absorbing effect and reduce the amplitude of the resonance.
８８１図は本発明の一実施例に係る熱交換器の断面図、
＠２図は従来の熱交換器の断面図である。
１・−・熱交換管、２・・・熱交換管の放出渦、３ａ。
ｂ・・−吸音材、
５・・・熱交換器の側壁。FIG. 881 is a cross-sectional view of a heat exchanger according to an embodiment of the present invention,
Figure @2 is a cross-sectional view of a conventional heat exchanger. 1.--Heat exchange tube, 2.. Release vortex of heat exchange tube, 3a. b...-Sound absorbing material, 5... Side wall of heat exchanger.
Claims (1)
された複数の熱交換管からなる管群を内蔵した熱交換器
において、同熱交換器内の音場の共鳴音波長の１／４だ
け熱交換器の壁面から熱交換器の内方へ間隔を隔てゝ、
ガス流れ方向、かつ、熱交換管の軸方向に吸音材を設置
したことを特徴とする熱交換器。In a heat exchanger that incorporates a tube group consisting of a plurality of heat exchange tubes arranged perpendicular to the gas flow and parallel to each other, 1/4 of the resonant sound wave length of the sound field within the heat exchanger. spaced from the wall of the heat exchanger to the inside of the heat exchanger,
A heat exchanger characterized in that a sound absorbing material is installed in the gas flow direction and in the axial direction of the heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2193036A JP2713647B2 (en) | 1990-07-23 | 1990-07-23 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2193036A JP2713647B2 (en) | 1990-07-23 | 1990-07-23 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0480596A true JPH0480596A (en) | 1992-03-13 |
| JP2713647B2 JP2713647B2 (en) | 1998-02-16 |
Family
ID=16301100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2193036A Expired - Fee Related JP2713647B2 (en) | 1990-07-23 | 1990-07-23 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2713647B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003046439A1 (en) | 2001-11-27 | 2003-06-05 | Mitsubishi Chemical Functional Products, Inc. | Foldable heat radiating sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846986U (en) * | 1981-09-22 | 1983-03-30 | 三菱重工業株式会社 | Shell-and-tube heat exchanger |
| JPH0245363U (en) * | 1988-09-22 | 1990-03-28 |
-
1990
- 1990-07-23 JP JP2193036A patent/JP2713647B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846986U (en) * | 1981-09-22 | 1983-03-30 | 三菱重工業株式会社 | Shell-and-tube heat exchanger |
| JPH0245363U (en) * | 1988-09-22 | 1990-03-28 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003046439A1 (en) | 2001-11-27 | 2003-06-05 | Mitsubishi Chemical Functional Products, Inc. | Foldable heat radiating sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2713647B2 (en) | 1998-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |