EP0864811B1 - High performance pressure waves generator - Google Patents
High performance pressure waves generator Download PDFInfo
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- EP0864811B1 EP0864811B1 EP98101586A EP98101586A EP0864811B1 EP 0864811 B1 EP0864811 B1 EP 0864811B1 EP 98101586 A EP98101586 A EP 98101586A EP 98101586 A EP98101586 A EP 98101586A EP 0864811 B1 EP0864811 B1 EP 0864811B1
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- Prior art keywords
- pressure wave
- wave source
- source according
- membrane
- intensity pressure
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- 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
Definitions
- the invention relates to a high-performance pressure wave source for generation individual high-energy pressure waves that can be repeated at short intervals each by igniting a defined volume of a combustible Fluid mixture, according to the preamble of claim 1.
- Relatively low power pressure and shock wave sources (around 10 to 100 mJ) are known in particular from medical technology, e.g. in the form of lithotripters.
- Current versions usually work according to the electromagnetic Principle, whereby plane, focusable by means of a coil / membrane unit Pressure waves are generated.
- a shock wave generator with a cross section expanded combustion chamber for generating detonation waves known from FR-A-1 378 962.
- DE-OS 39 21 808 describes a device for focused shock wave treatment known from tumors, with different ways of generating shock waves, e.g. using an explosive gas mixture (see claim 10). However, there are no indications for the constructive realization of this Given principles.
- Ignition also makes pressure waves flammable in reciprocating engines Fluid mixtures are generated, the ignition process being arbitrary in short time intervals is often repeatable.
- the fluid mixture at least the air fraction, is highly compressed (factor> 10), the combustion is caused by electrical spark ignition or injecting the fuel. It is generally a "soft", not too fast combustion aimed for, as detonation-like Burning processes the engine components (pistons, connecting rods, bearings, etc.) mechanically would overload.
- a transfer of this compression principle to others Pressure wave sources would be structurally and energetically relatively complex, i.e. little economical.
- the object of the invention On the basis of the principle of Acceleration of combustion up to detonation is the object of the invention in being a high power pressure wave source with short pulse duration and good repetition rate, which is relatively simple, handy, robust and is inexpensive and which works safely, reliably and economically.
- the pressure wave source comprises a combustion chamber in the form of a channel defined length with a cross-sectionally enlarged end.
- the face The end of the wide channel end forms an acoustic transmission element Acting membrane, with a discharge device in the area is available for the exhaust gas.
- the narrow end of the channel is used for feeding the mixture components and the ignition.
- vortex generators are provided, which the burning process accelerate to detonation.
- the geometric / volumetric Ratios is achieved that the majority of the mixture in the Area of the membrane is located, there burns off like an explosion and thus the Pressure wave generation causes.
- any acoustically conductive medium e.g. solid, liquid, gel-like, rubber-like
- Subclaims 2 to 9 contain preferred configurations of the high-performance pressure wave source according to the main claim.
- the high-performance pressure wave source 1 - hereinafter simply referred to as pressure wave source 1 - consists largely of a tube 2 with a round cross-section which varies over the length and which forms both a load-bearing housing and a flow channel / combustion chamber 3.
- the flow is from left to right, ie from the narrow to the trumpet-like widened tube end.
- the narrow tube end is provided with a feed device 4 for the components of a combustible fluid mixture, here air and hydrogen (H 2 ), the feed being able to take place continuously or intermittently during operation.
- the illustrated coaxial inflow of the components in the longitudinal direction of the pipe appears advantageous, but it is only one of many conceivable inflow variants.
- the fluid mixture consists of at least one fuel and one oxidizer, and the combustion behavior can be influenced via the mixing ratio, ie the deviation from the stoichiometric ratio. With a view to complete combustion, the attitude should tend to the "lean" side. Mixtures with more than two components are also conceivable, for example in order to influence the combustion behavior, the exhaust gas composition or the thermal load.
- the ignition device 5 works intermittently, with a high repetition rate (1 Hz or more) is aimed for. The most appropriate appears here electric spark ignition. Fast glow ignition may also be sufficient the requirements.
- the required acceleration of the erosion is achieved by means of several vortex generators 6 to 9, ie an increasingly turbulent flow character. This means that the burn-up speed can be increased to values well above 1000 m / s with short, high pressure peaks (detonation).
- the vortex generators 6 to 9 are designed, for example, as perforated screens with “tooth gaps” up to the tube wall. This can best be seen in the vortex generator 9, the central opening 10 of which is locally expanded in the form of a plurality of recesses 11 up to the tube wall. The smallest and the largest diameter of the vortex generator 9 are additionally indicated by dash-dotted lines.
- the cross-sectional and thus the volume distribution within the combustion chamber 3 is selected so that a large proportion of the fluid mixture detonates burns, i.e. behind the "flame acceleration zone" located.
- the trumpet-like shape shown with continuous cross-sectional expansion may be advantageous e.g. regarding the pressure wave propagation.
- other wall contours are also conceivable, e.g. with kinks and step-like diameter jumps. It can be enough be, two cylindrical pieces of pipe with very different diameters to connect via a perforated screen-like wall (jump in diameter). Tapered or multi-step transitions can also be used.
- combustion chamber cross sections do not have to be round either. square, rectangular or other geometries with and without corners are conceivable.
- the "pressure wave trumpet” shown could be achieved by using square instead of round cross sections while maintaining the steady, exponential Cross-sectional expansion to a "pressure wave horn” modified become.
- a large part of the volume of the combustion chamber burns off like a detonation, and that this volume part in Area of the membrane delimiting the combustion chamber at the end.
- the ignition process and the flame acceleration process should be restrict to a volumetrically small part of the combustion chamber. It is the case that the combustion chamber is full before each ignition process Length filled with flammable fluid mixture, i.e. is rinsed.
- a discharge device 12 is provided, here in the form of several, via the Scope of distributed outflow slots 13.
- the outflow process should be as possible cause no lateral reaction forces on the pressure wave source 1.
- the outflow slots 13 can also flaps, valves or other outflow organs be used.
- the combustion chamber 3 membrane 14 that closes at the end has both separating as well as a transferring function. On the one hand, it protects adjacent ones Substances before the immediate effects of the combustion process (Heat, combustion products etc.), on the other hand it forms a lossy, acoustic transmission element for the generated shock waves.
- the substance to be processed is either in physical contact with the membrane 14 Contact, or at least one other transmission medium, e.g. Gel, water or rubber, inserted between membrane and substance. The the latter, indirect contact is particularly given when the pressure waves generated are focused after the membrane.
- a focusing device 15 in is shown in dash-dot lines Form of an acoustic lens indicated. Clarity was on the details for the sake of doing without.
- the focusing device 15 or further focusing devices can only be detached with the Pressure wave source 1 connected, which corresponding connection options having.
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- 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)
Description
Die Erfindung betrifft eine Hochleistungs-Druckwellenquelle zur Erzeugung einzelner hochenergetischer, in kurzen Zeitabständen wiederholbarer Druckwellen jeweils durch Zündung eines definierten Volumens eines brennbaren Fluidgemisches, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a high-performance pressure wave source for generation individual high-energy pressure waves that can be repeated at short intervals each by igniting a defined volume of a combustible Fluid mixture, according to the preamble of claim 1.
Druck- und Stoßwellenquellen mit relativ niedriger Leistung (etwa 10 bis 100 mJ) sind insbesondere aus der Medizintechnik bekannt, z.B. in Form von Lithotriptern. Aktuelle Versionen arbeiten in der Regel nach dem elektromagnetischen Prinzip, wobei mittels einer Spule-/Membran-Einheit ebene, fokussierbare Druckwellen erzeugt werden.Relatively low power pressure and shock wave sources (around 10 to 100 mJ) are known in particular from medical technology, e.g. in the form of lithotripters. Current versions usually work according to the electromagnetic Principle, whereby plane, focusable by means of a coil / membrane unit Pressure waves are generated.
Für nichtmedizinische, insbesondere industrielle Anwendungen besteht ein Bedarf nach einer wesentlich höheren Druckwellenenergie (etwa 50- bis 100-fach größer). Eine einfache Vergrößerung/Skalierung der bekannten elektromagnetischen Stoßwellenquellen ist wegen ihres schlechten Wirkungsgrades nicht sinnvoll.There is a need for non-medical, especially industrial applications after a significantly higher pressure wave energy (about 50 to 100 times greater). A simple enlargement / scaling of the known electromagnetic Shock wave sources are not because of their poor efficiency meaningful.
Ein Stoßwellengenerator mit einer sich im Querschnitt erweiterten Brennkammer zur Erzeugung von Detonationswellen ist aus FR-A-1 378 962 bekannt.A shock wave generator with a cross section expanded combustion chamber for generating detonation waves known from FR-A-1 378 962.
Aus der DE-OS 39 21 808 ist eine Vorrichtung zur fokussierten Stoßwellenbehandlung von Tumoren bekannt, mit verschiedenen Möglichkeiten zur Stoßwellenerzeugung, z.B. mittels eines explosiven Gasgemisches (siehe Anspruch 10). Es werden aber keine Hinweise zur konstruktiven Verwirklichung dieses Prinzips gegeben.DE-OS 39 21 808 describes a device for focused shock wave treatment known from tumors, with different ways of generating shock waves, e.g. using an explosive gas mixture (see claim 10). However, there are no indications for the constructive realization of this Given principles.
Auch bei Hubkolbenmotoren werden Druckwellen durch Zünden brennbarer Fluidgemische erzeugt, wobei der Zündvorgang in kurzen Zeitabständen beliebig oft wiederholbar ist. Das Fluidgemisch, zumindest der Luftanteil, wird stark verdichtet (Faktor > 10), die Verbrennung wird durch elektrische Funkenzündung oder Einspritzen des Brennstoffes eingeleitet. Dabei wird generell eine "weiche", nicht zu schnelle Verbrennung angestrebt, da detonationsartige Brennvorgänge die Motorbauteile (Kolben, Pleuel, Lager etc.) mechanisch überlasten würden. Eine Übertragung dieses Verdichtungsprinzips auf andere Druckwellenquellen wäre konstruktiv und energetisch relativ aufwendig, d.h. wenig wirtschaftlich.Ignition also makes pressure waves flammable in reciprocating engines Fluid mixtures are generated, the ignition process being arbitrary in short time intervals is often repeatable. The fluid mixture, at least the air fraction, is highly compressed (factor> 10), the combustion is caused by electrical spark ignition or injecting the fuel. It is generally a "soft", not too fast combustion aimed for, as detonation-like Burning processes the engine components (pistons, connecting rods, bearings, etc.) mechanically would overload. A transfer of this compression principle to others Pressure wave sources would be structurally and energetically relatively complex, i.e. little economical.
Es ist bekannt, Wasserstoff-Luft-Gemische bei atmospärischem Druck zu zünden und die zunächst langsame, laminare Verbrennung (Deflagration) mit geringer Druckerhöhung durch strömungstechnische Maßnahmen (Wirbelerzeuger/Strömungshindemisse) über eine schnelle turbulente Verbrennung bis hin zur Detonation mit hohen Druckspitzen zu beschleunigen. Dieses Prinzip wird versuchstechnisch genutzt, um die möglicherweise bei Kernkraftwerksunfällen (Kernschmelzen, Wasserstofffreisetzung) auftretenden Verhältnisse und Belastungen im Reaktorgebäude zu simulieren. Siehe hierzu die Zeitschrift "NACHRICHTEN"-Forschungszentrum Karlsruhe Jahrgang 28 2-3/96 Seiten 175 bis 191. Zu diesem Zweck wurden große rohrförmige bzw. kanalartige Verbrennungskammern mit 12 m und 70 m Länge und mit variablen, strömungstechnisch wirksamen Einbauten/Geometrien errichtet, wobei die kleinere Anlage (FZK) in Deutschland, die größere (RUT) in Rußland steht.It is known to ignite hydrogen-air mixtures at atmospheric pressure and the initially slow, laminar combustion (deflagration) with less Pressure increase through fluidic measures (vortex generator / flow obstacle) through rapid turbulent combustion up to accelerate towards detonation with high pressure peaks. This principle is used for experimental purposes in order to avoid possible accidents at nuclear power plants (Meltdown, hydrogen release) occurring conditions and Simulate loads in the reactor building. See the magazine "NEWS" Research Center Karlsruhe Year 28 2-3 / 96 pages 175 to 191. For this purpose, large tubular or channel-like Combustion chambers with a length of 12 m and 70 m and with variable, fluidic effective internals / geometries, the smaller Plant (FZK) in Germany, the larger (RUT) in Russia.
Ausgehend von dem dort in großen Dimensionen verwirklichten Prinzip der Verbrennungsbeschleunigung bis zur Detonation besteht die Aufgabe der Erfindung darin, eine Hochleistungs-Druckwellenquelle mit kurzer Pulsdauer und guter Wiederholrate zu schaffen, welche relativ einfach, handlich, robust und preiswert ist und welche sicher, zuverlässig und wirtschaftlich arbeitet.On the basis of the principle of Acceleration of combustion up to detonation is the object of the invention in being a high power pressure wave source with short pulse duration and good repetition rate, which is relatively simple, handy, robust and is inexpensive and which works safely, reliably and economically.
Diese Aufgabe wird durch die im Anspruch 1 gekennzeichneten Merkmale gelöst, in Verbindung mit den gattungsbildenden Merkmalen in dessen Oberbegriff. This object is characterized by the features in claim 1 solved, in connection with the generic features in its generic term.
Die Druckwellenquelle umfaßt eine Verbrennungskammer in Form eines Kanales definierter Länge mit einem querschnittsmäßig erweiterten Ende. Den Stirnseitigen Abschluß des weiten Kanalendes bildet eine als akustisches Übertragungselement fungierende Membran, wobei in deren Bereich eine Abführeinrichtung für das Abgas vorhanden ist. Das enge Kanalende dient der Zufuhr der Gemischkomponenten sowie der Zündung. Zwischen dem engen und dem weiten Kanalende sind Wirbelerzeuger vorgesehen, welche den Abbrandvorgang bis zur Detonation beschleunigen. Durch die geometrischen/volumetrischen Verhältnisse wird erreicht, daß der Großteil des Gemisches sich im Bereich der Membran befindet, dort detonationsartig abbrennt und somit die Druckwellenerzeugung bewirkt. Mit der Membran kann im Einsatzfall ein beliebiges, akustisch leitendes Medium (z.B. fest, flüssig, gelartig, gummiartig) in Kontakt stehen. Es können sich auch Elemente zur Fokussierung der von der Membran ausgehenden Druckwellen anschließen.The pressure wave source comprises a combustion chamber in the form of a channel defined length with a cross-sectionally enlarged end. The face The end of the wide channel end forms an acoustic transmission element Acting membrane, with a discharge device in the area is available for the exhaust gas. The narrow end of the channel is used for feeding the mixture components and the ignition. Between the narrow and the Wide channel end vortex generators are provided, which the burning process accelerate to detonation. Through the geometric / volumetric Ratios is achieved that the majority of the mixture in the Area of the membrane is located, there burns off like an explosion and thus the Pressure wave generation causes. With the membrane, any acoustically conductive medium (e.g. solid, liquid, gel-like, rubber-like) in Are in contact. There may also be elements to focus the of the Connect diaphragm outgoing pressure waves.
Die Unteransprüche 2 bis 9 beinhalten bevorzugte Ausgestaltungen der Hochleistungs-Druckwellenquelle
nach dem Hauptanspruch.
Die Erfindung wird anschließend anhand der Zeichnung noch näher erläutert.The invention will be explained in more detail with reference to the drawing.
Diese zeigt in stark vereinfachter, perspektivischer Darstellung - mit Blickrichtung von rechts nach links im spitzen Winkel auf die Zeichenebene - einen Längsmittelschnitt durch eine Hochleistungs-Druckwellenquelle.This shows in a very simplified perspective view - with a view from right to left at an acute angle to the drawing plane - one Longitudinal center section through a high-performance pressure wave source.
Die Hochleistungs-Druckwellenquelle 1 - im folgenden vereinfacht nur
Druckwellenquelle 1 genannt - besteht großteils aus einem Rohr 2 mit über die
Länge variierendem, rundem Querschnitt, welches sowohl ein tragendes Gehäuse
als auch einen Strömungskanal/eine Verbrennungskammer 3 bildet. Die
Durchströmung erfolgt von links nach rechts, d.h. vom engen zum trompetenartig
erweiterten Rohrende. Das enge Rohrende ist mit einer Zuführeinrichtung
4 für die Komponenten eines brennbaren Fluidgemisches, hier Luft und Wasserstoff
(H2), versehen, wobei die Zufuhr im Betrieb kontinuierlich oder intermittierend
erfolgen kann. Die dargestellte, koaxiale Zuströmung der Komponenten
in Rohrlängsrichtung erscheint vorteilhaft, sie ist aber nur eine von
vielen denkbaren Zuströmvarianten. Wichtig ist in jedem Fall, daß schnell und
auf kurzem Weg ein möglichst homogenes Fluidgemisch erzeugt wird. Das
Fluidgemisch besteht mindestens aus einem Brennstoff und einem Oxidator,
wobei das Abbrandverhalten über das Mischungsverhältnis, d.h. die Abweichung
vom stöchiometrischen Verhältnis, beeinflußbar ist. Im Hinblick auf eine
vollständige Verbrennung sollte die Einstellung zur "mageren" Seite hin tendieren.
Gemische mit mehr als zwei Komponenten sind ebenfalls denkbar, beispielsweise
um das Abbrandverhalten, die Abgaszusammensetzung oder die
thermische Belastung zu beeinflussen.The high-performance pressure wave source 1 - hereinafter simply referred to as pressure wave source 1 - consists largely of a
Die Zündeinrichtung 5 arbeitet intermittierend, wobei eine hohe Wiederholrate
(1 Hz oder mehr) angestrebt wird. Am zweckmäßigsten erscheint hier eine
elektrische Funkenzündung. Möglicherweise genügt auch eine schnelle Glühzündung
den Anforderungen.The
Mit mäßiger, d.h. wirtschaftlicher Zündenergie läßt sich zunächst nur eine sehr
niedrige Abbrandgeschwindigkeit von beispielsweise 0,15 m/s erzeugen, welche
noch keine nutzbaren Druckwellen hervorrufen kann. Die erforderliche
Beschleunigung des Abbrandes wird mittels mehrerer Wirbelerzeuger 6 bis 9,
d.h. einen zunehmend turbulenten Strömungscharakter, erreicht. Damit läßt
sich die Abbrandgeschwindigkeit auf Werte weit über 1000 m/s mit kurzen,
hohen Druckspitzen (Detonation) steigern. Im vorliegenden Fall sind die Wirbelerzeuger
6 bis 9 beispielsweise als Lochblenden mit "Zahnlücken" bis zur
Rohrwand ausgeführt. Am besten ist dies beim Wirbelerzeuger 9 zu erkennen,
dessen zentrische Öffnung 10 örtlich in Form mehrerer Aussparungen 11 bis
zur Rohrwand erweitert ist. Der kleinste und der größte Durchmesser des Wirbelerzeugers
9 sind zusätzlich strichpunktiert angedeutet. With moderate, ie economical, ignition energy, only a very low burn-up speed of, for example, 0.15 m / s can initially be generated, which cannot yet produce usable pressure waves. The required acceleration of the erosion is achieved by means of
Die optimale Anzahl und Geometrie der Wirbelerzeuger ist voraussichtlich experimentell zu ermitteln. Nach Passieren des letzten Wirbelerzeugers sollte die Verbrennung jedenfalls Detonationscharakter haben.The optimal number and geometry of the vortex generators is likely to be experimental to investigate. After passing the last vortex generator, the In any case, combustion has the character of a detonation.
Die Querschnitts- und damit die Volumenverteilung innerhalb der Verbrennungskammer
3 ist so gewählt, daß ein großer Anteil des Fluidgemisches detonationsartig
verbrennt, d.h. sich hinterhalb der "Flammenbeschleunigungszone"
befindet.The cross-sectional and thus the volume distribution within the
Die dargestellte, trompetenartige Form mit stetiger Querschnittserweiterung, z.B. gemäß einer Exponentialfunktion, kann vorteilhaft sein, z.B. hinsichtlich der Druckwellenausbreitung. Es sind aber auch andere Wandkonturen vorstellbar, z.B. mit Knicken und stufenartigen Durchmessersprüngen. Es kann ausreichend sein, zwei zylindrische Rohrstücke mit stark unterschiedlichem Durchmesser über eine lochblendenartige Wand (Durchmessersprung) zu verbinden. Auch kegelige oder mehrfach gestufte Übergänge können anwendbar sein.The trumpet-like shape shown with continuous cross-sectional expansion, e.g. according to an exponential function, may be advantageous e.g. regarding the pressure wave propagation. However, other wall contours are also conceivable, e.g. with kinks and step-like diameter jumps. It can be enough be, two cylindrical pieces of pipe with very different diameters to connect via a perforated screen-like wall (jump in diameter). Tapered or multi-step transitions can also be used.
Die Verbrennungskammerquerschnitte müssen auch nicht rund sein. Quadratische, rechteckige oder andere Geometrien mit und ohne Ecken sind vorstellbar.The combustion chamber cross sections do not have to be round either. square, rectangular or other geometries with and without corners are conceivable.
Die dargestellte "Druckwellentrompete" könnte durch die Verwendung von quadratischen statt runden Querschnitten unter Beibehaltung der stetigen, exponentiellen Querschnittserweiterung zu einem "Druckwellenhorn" modifiziert werden. Letztlich ist wichtig, daß ein großer Teil des Volumens der Verbrennungskammer detonationsartig abbrennt, und daß dieser Volumensteil sich im Bereich der die Verbrennungskammer stimseitig begrenzenden Membran befindet. Der Zündvorgang und der Flammenbeschleunigungsvorgang sollen sich auf einen volumetrisch kleinen Teil der Verbrennungskammer beschränken. Dabei ist es so, daß vor jedem Zündvorgang die Verbrennungskammer in voller Länge mit brennbarem Fluidgemisch gefüllt, d.h. gespült wird. The "pressure wave trumpet" shown could be achieved by using square instead of round cross sections while maintaining the steady, exponential Cross-sectional expansion to a "pressure wave horn" modified become. Ultimately it is important that a large part of the volume of the combustion chamber burns off like a detonation, and that this volume part in Area of the membrane delimiting the combustion chamber at the end. The ignition process and the flame acceleration process should be restrict to a volumetrically small part of the combustion chamber. It is the case that the combustion chamber is full before each ignition process Length filled with flammable fluid mixture, i.e. is rinsed.
Für die bei der Verbrennung entstehenden Abgase ist im Bereich der Membran
14 eine Abführeinrichtung 12 vorgesehen, hier in Form mehrerer, über den
Umfang verteilter Abströmschlitze 13. Der Abströmvorgang sollte möglichst
keine seitlichen Reaktionskräfte auf die Druckwellenquelle 1 hervorrufen. Anstelle
der Abströmschlitze 13 können auch Klappen, Ventile oder andere Ausströmorgane
verwendet werden.For the exhaust gases generated during combustion is in the area of the
Falls unverbrannte Restmengen an Brennstoff im Abgas enthalten sind, kann
eine gezielte Nachverbrennung sinnvoll bzw. erforderlich sein. Die die Verbrennungskammer
3 stirnseitig abschließende Membran 14 hat sowohl eine
trennende als auch eine übertragende Funktion. Einerseits schützt sie angrenzende
Substanzen vor den unmittelbaren Auswirkungen des Verbrennungsvorganges
(Hitze, Verbrennungsprodukte etc.), andererseits bildet sie ein verlustannes,
akustisches Übertragungselement für die erzeugten Stoßwellen. Die
zu bearbeitende Substanz steht entweder direkt mit der Membran 14 in körperlichem
Kontakt, oder es ist mindestens ein weiteres Übertragungsmedium, z.B.
Gel, Wasser oder Gummi, zwischen Membran und Substanz eingefügt. Die
letztgenannte, indirekte Kontaktierung ist insbesondere dann gegeben, wenn
die erzeugten Druckwellen nach der Membran fokussiert werden.If there are unburned residual amounts of fuel in the exhaust gas,
targeted afterburning may be useful or necessary. The the
Im vorliegenden Beispiel ist strichpunktiert eine Fokussiereinrichtung 15 in
Form einer akustischen Linse angedeutet. Auf Details wurde der Übersichtlichkeit
halber verzichtet. Die Fokussiereinrichtung 15 oder weitere Fokussiereinrichtungen
weden nur im Bedarsfall, als Anbauelemente, lösbar mit der
Druckwellenquelle 1 verbunden, welche entsprechende Anschlußmöglichkeiten
aufweist.In the present example, a focusing
Hinsichtlich der Anwendungsmöglichkeiten der Erfindung ist zu sagen, daß deren tatsächlicher Umfang jetzt noch nicht absehbar ist. Voraussichtlich können die meisten Substanzen von fest bis gasförmig behandelt werden. Insbesondere ist an Flüssigkeiten mit Feststoffbeimischung, an Stäube, Pulver und Granulate zu denken. Denkbare Wirkungen sind z.B. Homogenisieren, Zerkleinern, Beseitigen von Hohlräumen oder anderen "Fehlstellen", Auflösen von Ablagerungen, Verkrustungen etc. und somit das Reinigen von Oberflächen sowie vieles mehr. With regard to the possible applications of the invention, it can be said that the actual scope of which is not yet foreseeable. Probably can most substances are treated from solid to gaseous. In particular is on liquids with solids admixture, on dust, powder and Thinking granules. Possible effects are e.g. Homogenizing, crushing, Removing voids or other "missing parts", dissolving Deposits, incrustations etc. and thus the cleaning of surfaces and much more.
- 11
- Hochleistungs-DruckwellenquelleHigh-pressure wave source
- 22
- Rohrpipe
- 33
- Verbrennungskammercombustion chamber
- 44
- Zuführeinrichtungfeeding
- 55
- Zündeinrichtungignition device
- 66
- Wirbelerzeugervortex generators
- 77
- ""
- 88th
- ""
- 99
- ""
- 1010
- Öffnungopening
- 1111
- Aussparungrecess
- 1212
- Abführeinrichtungremoval device
- 1313
- AbströmschlitzAbströmschlitz
- 1414
- Membranmembrane
- 1515
- Fokussiereinrichtungfocusing
Claims (9)
- High-intensity pressure wave source for generating individual high-energy pressure waves repeatable at short intervals of time, on each occasion by igniting a defined volume of a combustible fluid mixture and by increasing its rate of burning up to detonation, with a channel of defined length expanded in cross-section towards one of its two ends and forming a combustion chamber (3), a feed device (4) for the components of the fluid mixture and an ignition device (5) in the area of the narrow channel end, a discharge device (12) for the exhaust gas in the area of the wide channel end, characterised by a membrane (14) sealing the wide channel end on the front side and forming an acoustic transmission element, together with a plurality of vortex generators (6 to 9) distributed over the channel length.
- High-intensity pressure wave source according to claim 1, characterised by arrangement for operation with lean to stoichiometric hydrogen-air mixture.
- High-intensity pressure wave source according to claim 1 or 2, characterised by a construction of the combustion chamber (3) as a pipe (2) expanded continuously towards the membrane (14), e.g. after the manner of a trumpet.
- High-intensity pressure wave source according to one or more of claims 1 to 3, characterised by a construction of the ignition device (5) as an electrical spark ignition device.
- High-intensity pressure wave source according to one or more of claims 1 to 4, characterised by a discharge device (12) in the form of a plurality of exhaust slits (13) in the area of the membrane edge.
- High-intensity pressure wave source according to one or more of claims 1 to 5, characterised by shutter-type vortex generators (6 to 9) with a central opening (10) and with a plurality of tooth gap-type recesses (11) continuing said opening (10) into the area of the channel wall in places.
- High-intensity pressure wave source according to claim 3, characterised by a pipe geometry, in which at least in the vicinity of the membrane (14) the pipe inner diameter increases exponentially in relation to the pipe longitudinal coordinate.
- High-intensity pressure wave source according to one or more of claims 1 to 7, characterised by a pulse length of the individual pressure waves generated of less than 100 microseconds and a repetition rate of at least one cycle per second.
- High-intensity pressure wave source according to one or more of claims 1 to 8, characterised by the possibility of adding one or more acoustic focussing devices (15) downstream of the membrane (14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19709918 | 1997-03-11 | ||
| DE19709918A DE19709918C2 (en) | 1997-03-11 | 1997-03-11 | High performance pressure wave source |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0864811A2 EP0864811A2 (en) | 1998-09-16 |
| EP0864811A3 EP0864811A3 (en) | 1999-07-14 |
| EP0864811B1 true EP0864811B1 (en) | 2003-04-16 |
Family
ID=7822929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98101586A Expired - Lifetime EP0864811B1 (en) | 1997-03-11 | 1998-01-30 | High performance pressure waves generator |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6408614B1 (en) |
| EP (1) | EP0864811B1 (en) |
| DE (2) | DE19709918C2 (en) |
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| US6324956B1 (en) * | 2000-02-23 | 2001-12-04 | Apti, Inc. | Method and apparatus for neutralization of mines and obstacles |
| US6776256B2 (en) * | 2001-04-19 | 2004-08-17 | Schlumberger Technology Corporation | Method and apparatus for generating seismic waves |
| US6662550B2 (en) * | 2002-04-25 | 2003-12-16 | Science Applications International Corporation | Method and apparatus for improving the efficiency of pulsed detonation engines |
| DE10234144A1 (en) * | 2002-07-26 | 2004-02-05 | Dornier Medtech Gmbh | lithotripter |
| EP1671627B8 (en) | 2004-12-15 | 2010-04-07 | Dornier MedTech Systems GmbH | Improvement of cell therapy and tissue regeneration in patients with cardiovascular and neurological diseases by means of shockwaves |
| GB2426578A (en) | 2005-05-27 | 2006-11-29 | Thorn Security | A flame detector having a pulsing optical test source that simulates the frequency of a flame |
| DE102005025660B4 (en) | 2005-06-03 | 2015-10-15 | Cosma Engineering Europe Ag | Apparatus and method for explosion forming |
| DE102005037043C5 (en) * | 2005-08-05 | 2017-12-14 | Dornier Medtech Systems Gmbh | Shock wave therapy device with image acquisition |
| BRPI0710274A2 (en) * | 2006-04-17 | 2011-08-09 | Soundblast Technologies Llc | system and method for igniting a gaseous or dispersive fuel-oxidant mixture |
| CN101443680B (en) * | 2006-04-17 | 2013-01-16 | 声霸技术有限公司 | A system and method for ignition of a gaseous or dispersive fuel-oxidant mixture |
| US7882926B2 (en) * | 2006-04-17 | 2011-02-08 | Soundblast Technologies, Llc | System and method for generating and directing very loud sounds |
| US8302730B2 (en) | 2006-04-17 | 2012-11-06 | Soundblast Technologies, Llc | System and method for generating and controlling conducted acoustic waves for geophysical exploration |
| US8905186B2 (en) | 2006-04-17 | 2014-12-09 | Soundblast Technologies, Llc | System for coupling an overpressure wave to a target media |
| US9116252B2 (en) * | 2006-04-17 | 2015-08-25 | Soundblast Technologies Llc | System and method for coupling an overpressure wave to a target media |
| DE102006037742B4 (en) | 2006-08-11 | 2010-12-09 | Cosma Engineering Europe Ag | Method and apparatus for explosion forming |
| DE102006037754B3 (en) | 2006-08-11 | 2008-01-24 | Cosma Engineering Europe Ag | Procedure for the explosion forming, comprises arranging work piece in tools and deforming by means of explosion means, igniting the explosion means in ignition place of the tools using induction element, and cooling the induction element |
| DE102006056788B4 (en) | 2006-12-01 | 2013-10-10 | Cosma Engineering Europe Ag | Closing device for explosion forming |
| DE102006060372A1 (en) | 2006-12-20 | 2008-06-26 | Cosma Engineering Europe Ag | Workpiece for explosion reformation process, is included into molding tool and is deformed from output arrangement by explosion reformation |
| DE102007007330A1 (en) | 2007-02-14 | 2008-08-21 | Cosma Engineering Europe Ag | Method and tool assembly for explosion forming |
| US7944776B2 (en) * | 2007-05-11 | 2011-05-17 | Lockheed Martin Corporation | Engine and technique for generating an acoustic signal |
| DE102007023669B4 (en) | 2007-05-22 | 2010-12-02 | Cosma Engineering Europe Ag | Ignition device for explosion forming |
| DE102007036196A1 (en) | 2007-08-02 | 2009-02-05 | Cosma Engineering Europe Ag | Apparatus for supplying a fluid for explosion forming |
| DE102008006979A1 (en) | 2008-01-31 | 2009-08-06 | Cosma Engineering Europe Ag | Device for explosion forming |
| US9217392B2 (en) | 2011-12-12 | 2015-12-22 | Curtis E. Graber | Vortex cannon with enhanced ring vortex generation |
| WO2014123442A1 (en) * | 2013-02-06 | 2014-08-14 | Некоммерческое Партнерство По Научной, Образовательной И Инновационной Деятельности "Центр Импульсного Детонационного Горения" | High-speed pulse detonation gas burner and method of functioning thereof |
| RU2015104630A (en) * | 2013-02-06 | 2017-03-14 | Некоммерческое партнерство по научной, образовательной и инновационной деятельности "Центр импульсно-детонационного горения" | Device for turbulization and flame front acceleration |
| US9581704B2 (en) | 2015-01-22 | 2017-02-28 | Soundblast Technologies, Llc | System and method for accelerating a mass using a pressure produced by a detonation |
| CN105750286B (en) * | 2016-03-24 | 2018-11-09 | 杭州启明医疗器械有限公司 | A kind of hand-held high-frequency vibration washer of embedded type medical instrument |
| WO2020003307A1 (en) * | 2018-06-24 | 2020-01-02 | Pdt Argo Ltd. | Shock wave generator devices and systems |
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| GB386908A (en) * | 1932-08-16 | 1933-01-26 | Marco Barbera | Improvements in impulse and reaction engines |
| US4189026A (en) * | 1954-01-13 | 1980-02-19 | The United States Of America As Represented By The Secretary Of The Navy | Underwater generation of low frequency sound |
| DE1233207B (en) * | 1960-06-29 | 1967-01-26 | Klein Hans Christof | Device for the periodic generation of highly compressed working gas for thermal engines |
| US3249177A (en) * | 1961-11-13 | 1966-05-03 | Bolt Associates Inc | Acoustic wave impulse generator repeater |
| FR1378962A (en) * | 1963-10-02 | 1964-11-20 | Bolkow Entwicklungen Kg | Advanced sound generator |
| US3588801A (en) * | 1968-11-07 | 1971-06-28 | Willie B Leonard | Impulse generator |
| GB1332154A (en) * | 1970-04-30 | 1973-10-03 | British Petroleum Co | Burners having a pulsating mode of operation |
| CH574734A5 (en) * | 1973-10-12 | 1976-04-30 | Dornier System Gmbh | |
| US4642611A (en) * | 1983-10-14 | 1987-02-10 | Koerner Andre F | Sound engine |
| DE3704153A1 (en) * | 1987-02-11 | 1988-08-25 | Schubert Werner | Therapeutic explosion-pressure surge device |
| DE3921808A1 (en) * | 1989-07-03 | 1991-01-17 | Schubert Werner | Breaking up internal tumours using shock waves - involves gas bubbles to enhance effect in region of tumour |
| JPH07276632A (en) * | 1994-04-12 | 1995-10-24 | Sharp Corp | Ink jet printer |
| US5430691A (en) * | 1994-05-27 | 1995-07-04 | Fridman; Igor | Shock wave generator |
| US5864517A (en) * | 1997-03-21 | 1999-01-26 | Adroit Systems, Inc. | Pulsed combustion acoustic wave generator |
-
1997
- 1997-03-11 DE DE19709918A patent/DE19709918C2/en not_active Expired - Fee Related
-
1998
- 1998-01-30 DE DE59807921T patent/DE59807921D1/en not_active Expired - Fee Related
- 1998-01-30 EP EP98101586A patent/EP0864811B1/en not_active Expired - Lifetime
- 1998-03-10 US US09/037,952 patent/US6408614B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6408614B1 (en) | 2002-06-25 |
| DE59807921D1 (en) | 2003-05-22 |
| DE19709918A1 (en) | 1998-09-24 |
| EP0864811A2 (en) | 1998-09-16 |
| DE19709918C2 (en) | 2001-02-01 |
| EP0864811A3 (en) | 1999-07-14 |
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