JPS60213706A - Pulse combustion apparatus - Google Patents
Pulse combustion apparatusInfo
- Publication number
- JPS60213706A JPS60213706A JP7028484A JP7028484A JPS60213706A JP S60213706 A JPS60213706 A JP S60213706A JP 7028484 A JP7028484 A JP 7028484A JP 7028484 A JP7028484 A JP 7028484A JP S60213706 A JPS60213706 A JP S60213706A
- Authority
- JP
- Japan
- Prior art keywords
- supply path
- air
- space
- combustion
- noise
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C15/00—Apparatus in which combustion takes place in pulses influenced by acoustic resonance in a gas mass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/02—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in parallel arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、パルス燃焼器に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to a pulse combustor.
従来例の構成とその問題点
パルス燃焼器は始動時に燃料ガスと送風ファンにより燃
焼用空気を燃焼室に供給させ、点火プラグを作動させる
ことにより強制的に燃焼を行わせる。ひとたび系が安定
して燃焼サイクルを形成すると、点火プラグや送風ファ
ンを停止しても、燃焼用空気を自動吸引し、自己着火に
よυ数十〜数百ヘルツの一定周波数でパルス燃焼を継続
する。Conventional Structure and Problems When a pulse combustor is started, combustion air is supplied to the combustion chamber using fuel gas and a blower fan, and combustion is forced by operating a spark plug. Once the system has stabilized and formed a combustion cycle, even if the spark plugs and blower fan are stopped, combustion air is automatically sucked in and self-ignition continues pulsed combustion at a constant frequency of tens to hundreds of hertz. do.
このようなパルス燃焼器は高負荷で燃焼し、熱伝達特性
がよく、始動時を除けば着火や給排気を自動で行い、構
造が簡単であるなどの利点がある。Such a pulse combustor burns under high load, has good heat transfer characteristics, automatically performs ignition and air supply/exhaust except during startup, and has the advantages of a simple structure.
しかしながら、パルス燃焼器は燃焼時の騒音が大きいと
いう問題があった。このためにマフラを装着することが
行われているが、マフラを装着すると音響インピーダン
スが変わるために、燃焼サイクルの基本周波数が変わる
ことがある。このために折角装着したマフラが思ったほ
ど効果が上がらないことが多い。そこで空気パルプ装置
を空気クッションチャンバで囲み、空気クッションチャ
ンバの音響インピーダンスをパルス燃焼の基本周波数に
影響を与えないくらい充分に大きくシ、マ午フラを装着
しても所定の周波数が維持でき、マフラの消音を効果的
にしている。ところがパルス燃焼の場合、燃焼音が非常
に大きいので、空気クッジョンチャンバの壁面の振動や
、壁面からの音の漏れ特に低周波数域の音の漏れが太き
いという問題点を有していた。このために、マフラを装
着して給、排気口より出る音を減音しても、本体からも
れる音が大きくなるという問題が生じる場合もあった。However, the pulse combustor has the problem of high noise during combustion. For this purpose, a muffler is installed, but since the acoustic impedance changes when a muffler is installed, the fundamental frequency of the combustion cycle may change. For this reason, the muffler that has been installed is often not as effective as expected. Therefore, we surrounded the air pulp equipment with an air cushion chamber, and made the acoustic impedance of the air cushion chamber sufficiently large so as not to affect the fundamental frequency of pulse combustion. The sound is effectively muted. However, in the case of pulse combustion, since the combustion noise is very loud, there are problems such as vibration of the wall surface of the air cushion chamber and sound leakage from the wall surface, especially sound leakage in the low frequency range. For this reason, even if a muffler is installed to reduce the noise emitted from the supply and exhaust ports, there are cases in which a problem arises in that the sound leaking from the main body becomes louder.
発明の目的
本発明はこれらの問題点に鑑みて行われたもので、簡単
な構造で低騒音のパルス燃焼器を提供するものである。OBJECTS OF THE INVENTION The present invention has been made in view of these problems, and it is an object of the present invention to provide a pulse combustor with a simple structure and low noise.
発明の構成
上記目的を達成するために本発明は空気供給路内に、そ
の内壁面と空隙を取って有孔板を設け、この空隙に吸音
材を充填したものである。Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a perforated plate in the air supply path with a gap between it and the inner wall surface thereof, and fills this gap with a sound absorbing material.
実施例の説明 本発明の一実施例を第1図を用いて説明する。Description of examples An embodiment of the present invention will be described with reference to FIG.
本実施例のパルス燃焼器は第1図に示すように、燃焼室
1、ティルパイプ2、臓火プラプ3、空気室4、空気供
給路6、空気パルプ装置6、有孔板、7、空気クッショ
ンチャンバ8、燃料供給路9、燃料パルプ装置10、吸
音材11から構成される。As shown in FIG. 1, the pulse combustor of this embodiment includes a combustion chamber 1, a till pipe 2, an internal fire plug 3, an air chamber 4, an air supply path 6, an air pulp device 6, a perforated plate 7, an air It is composed of a cushion chamber 8, a fuel supply path 9, a fuel pulp device 10, and a sound absorbing material 11.
パルス燃焼器の燃焼音は、燃焼室1とティルパイプ2の
形状により決定される基本周波数f0と基本周波数の整
数倍の音からなる高調波成分をもっている。この基本周
波数f0は数十ヘルツから数百ヘルツと低周波の音であ
るので、この音が空気クッションチャンバ8の壁面を振
動させて、壁面からの音の漏れ特に低周波成分の音の漏
れを大きくしている。The combustion sound of the pulse combustor has a fundamental frequency f0 determined by the shapes of the combustion chamber 1 and the till pipe 2, and harmonic components consisting of sounds at integral multiples of the fundamental frequency. Since this fundamental frequency f0 is a low-frequency sound ranging from several tens of hertz to several hundred hertz, this sound vibrates the wall surface of the air cushion chamber 8, thereby preventing sound leakage from the wall surface, especially low-frequency component sound leakage. It's getting bigger.
そこで本実施例では、空等バルブ装置6を通過し、空気
クッションチャンバ8に入ってくる音を低減するために
、空気供給路S内にこの空気供給路5の内壁面と空隙を
取って有孔板7f:設け1、さらに空気供給路6と有孔
板7の空隙に吸音材11を充填している。有孔板7には
金属板などに小孔を多数あけたものや、焼結金属や発泡
セラミックなどの多数の小孔を有するものを用いること
ができる。第2図に示すように、空気室4を通過した燃
焼音12は有孔板7の表面に穿いである多数の小孔13
よシ吸音され、空気供給路6と有孔板7の間の空隙に入
る。空隙には吸音材11を充填しているために、空隙に
入った音は、空気供給路5の内壁面と有孔板7の表面の
間で、吸音材11に吸音されながら、衝突や分散を繰り
返し、相互干渉により燃焼音12が消音される。この相
互干渉による消音は、低周波数域から高周波数域に至る
広範囲で効果がある。また吸音材11は、流体をさえぎ
り、音圧を通過させる性質を有しているので、本発明を
実施しても、空気供給路6の流れ状態は変化せず、燃焼
に影響を与えない。さらに本発明は、燃焼音を低減する
方法として、空気供給系に膨張室等を設けることにより
、音圧と流動圧−とを同時に減衰するという方法を用い
ていないので、空気パルプ装置6の空気パルプ14の作
動圧を減衰せずに燃焼音を消音できる。その結果、空気
パルプ14の開閉もスムーズに行われ、燃焼状態を良好
に維持しつつ、燃焼音の低減を行うことができる。Therefore, in this embodiment, in order to reduce the sound that passes through the air valve device 6 and enters the air cushion chamber 8, a gap is created in the air supply path S with the inner wall surface of the air supply path 5. Perforated plate 7f: provided 1, and the gap between the air supply path 6 and the perforated plate 7 is filled with sound absorbing material 11. The perforated plate 7 may be a metal plate with many small holes, or a material with many small holes such as sintered metal or foamed ceramic. As shown in FIG.
The sound is absorbed and enters the gap between the air supply path 6 and the perforated plate 7. Since the void is filled with the sound absorbing material 11, the sound that enters the void will be absorbed by the sound absorbing material 11 between the inner wall surface of the air supply path 5 and the surface of the perforated plate 7, and will not collide or be dispersed. This is repeated, and the combustion sound 12 is muffled due to mutual interference. Silencing due to this mutual interference is effective over a wide range from low frequency ranges to high frequency ranges. Further, since the sound absorbing material 11 has the property of blocking fluid and allowing sound pressure to pass through, even if the present invention is implemented, the flow state of the air supply path 6 will not change and combustion will not be affected. Furthermore, the present invention does not use a method of simultaneously attenuating sound pressure and flow pressure by providing an expansion chamber or the like in the air supply system as a method for reducing combustion noise. Combustion noise can be muffled without attenuating the operating pressure of the pulp 14. As a result, the air pulp 14 is opened and closed smoothly, and combustion noise can be reduced while maintaining a good combustion state.
以上により、燃焼室1で発生した燃焼音は、空気供給路
6と通過する際に消音され、空気クッションチャンバ8
に放射される。それ故に空気クッションチャンバ8の壁
面を振動させる原因となる低周波成分の音が減衰し、空
気クッションチャンバ8の壁面はほとんど振動せず、壁
面からの音の漏れが著しく減少する。従って、従来のパ
ルス燃焼器と比較して低騒音化がはかられる。As described above, the combustion noise generated in the combustion chamber 1 is muffled when passing through the air supply path 6, and the air cushion chamber 8
is radiated to. Therefore, the low-frequency sound component that causes the wall surface of the air cushion chamber 8 to vibrate is attenuated, the wall surface of the air cushion chamber 8 hardly vibrates, and the leakage of sound from the wall surface is significantly reduced. Therefore, noise can be reduced compared to conventional pulse combustors.
発明の効果
本発明よれば、空気クッションチャンバの壁面 −の振
動と、壁面からの音の漏れが著しく減少し、パルス燃焼
器の低騒音化に効果がある。Effects of the Invention According to the present invention, the vibration of the wall surface of the air cushion chamber and the leakage of sound from the wall surface are significantly reduced, which is effective in reducing the noise of the pulse combustor.
第1図は本発明の一実施例のパルス燃焼器の断面成因、
第2図は同パルス燃焼器の空気供給路の (拡大断面図
である。
1・・・・・・燃焼室、2・・・・・・ティルパイプ、
6・・・・・・空気供給路、6・・・・・・空気パルプ
装置、7・・・・・・有孔板、8・・・・・・空気クッ
ションチャンバ、11・・・・・・吸音材。FIG. 1 shows the cross-sectional structure of a pulse combustor according to an embodiment of the present invention.
Figure 2 is an enlarged sectional view of the air supply path of the pulse combustor. 1... Combustion chamber, 2... Till pipe,
6... Air supply path, 6... Air pulp device, 7... Perforated plate, 8... Air cushion chamber, 11...・Sound absorbing material.
Claims (1)
他端に接続した燃料供給路および空気供給路と、前記燃
料供給路に連結した燃料バルブ装置と、前記空気供給路
に連結した空気パルプ装置と、前記空気パルプ装置と、
その内部に収納するとともに、前記空気供給路に連結し
た空気クッションチャンバとを備え、前記空気供給路内
に、同空気供給路の内壁面と空隙を取って有孔板を設け
、前記空隙に吸音材全充填したパルス燃焼器。A till pipe connected to one end of the combustion chamber, a fuel supply path and an air supply path connected to the other end of the combustion chamber, a fuel valve device connected to the fuel supply path, and an air pulp connected to the air supply path. an apparatus; the air pulp apparatus;
An air cushion chamber is housed in the air cushion chamber and connected to the air supply path, and a perforated plate is provided in the air supply path with a gap between the inner wall surface of the air supply path and a sound absorbing chamber. Fully filled pulse combustor.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7028484A JPS60213706A (en) | 1984-04-09 | 1984-04-09 | Pulse combustion apparatus |
US06/718,452 US4639208A (en) | 1984-04-03 | 1985-04-01 | Pulse combustion apparatus with a plurality of pulse burners |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7028484A JPS60213706A (en) | 1984-04-09 | 1984-04-09 | Pulse combustion apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60213706A true JPS60213706A (en) | 1985-10-26 |
JPH0421088B2 JPH0421088B2 (en) | 1992-04-08 |
Family
ID=13427026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7028484A Granted JPS60213706A (en) | 1984-04-03 | 1984-04-09 | Pulse combustion apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60213706A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7341448B2 (en) * | 2004-07-15 | 2008-03-11 | Ceramat, S.Coop. | Gas-fired heating apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5883609U (en) * | 1981-11-30 | 1983-06-06 | 株式会社東芝 | pulse combustion device |
JPS5897441U (en) * | 1981-12-25 | 1983-07-02 | 株式会社東芝 | pulse burner |
-
1984
- 1984-04-09 JP JP7028484A patent/JPS60213706A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5883609U (en) * | 1981-11-30 | 1983-06-06 | 株式会社東芝 | pulse combustion device |
JPS5897441U (en) * | 1981-12-25 | 1983-07-02 | 株式会社東芝 | pulse burner |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7341448B2 (en) * | 2004-07-15 | 2008-03-11 | Ceramat, S.Coop. | Gas-fired heating apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0421088B2 (en) | 1992-04-08 |
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