EP3134626A1 - Procédé permettant d'agir sur l'écoulement d'un fluide - Google Patents

Procédé permettant d'agir sur l'écoulement d'un fluide

Info

Publication number
EP3134626A1
EP3134626A1 EP15720643.4A EP15720643A EP3134626A1 EP 3134626 A1 EP3134626 A1 EP 3134626A1 EP 15720643 A EP15720643 A EP 15720643A EP 3134626 A1 EP3134626 A1 EP 3134626A1
Authority
EP
European Patent Office
Prior art keywords
fluid
fluid flow
flow
honeycomb body
zone
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.)
Withdrawn
Application number
EP15720643.4A
Other languages
German (de)
English (en)
Inventor
Peter Hirth
Thomas HÄRIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3134626A1 publication Critical patent/EP3134626A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details

Definitions

  • the invention relates to a method for influencing a fluid flow.
  • the method is used in particular in the treatment of an exhaust gas of an internal combustion engine.
  • the method is preferred for chemical processes in a Fischer-Tropsch synthesis (carbon monoxide reacts with hydrogen to hydrocarbon compounds), in the methanation (carbon dioxide or carbon monoxide react with hydrogen to methane) and in the context of a Sabatier process (carbon dioxide and hydrogen react to methane) are used.
  • the process is basically suitable for any exothermic, heterogeneously catalyzed gas-phase reaction (ie for any exothermic conversion of gases to, for example, solid or liquid catalysts).
  • a gas mixture is passed over a catalyst.
  • pellet catalysts have hitherto been used in these processes, which can ensure removal of the heat produced during the exothermic reactions (but only to a small extent).
  • this form of catalyst causes high equipment costs, while at the same time the throughput through the catalyst is limited, because only small diameter pipes could be used for adequate heat removal (for pellet catalysts with a small cross-sectional area).
  • a method for influencing a fluid flow wherein the fluid flow is present in a fluid line with a wall.
  • a honeycomb body having a fluid inlet side and a fluid outlet side is disposed in the fluid conduit; wherein the honeycomb body preferably has at least one at least partially structured metallic layer, which at least partially forms a honeycomb structure with a cross-sectional area and with channels for the fluid flow from the fluid inlet side to the fluid outlet side.
  • the honeycomb body has an outer boundary, in particular in the manner of a jacket or an outer wall.
  • the honeycomb structure has a peripheral, delimitation-oriented outer zone and a central zone arranged within the outer zone, wherein the outer zone comprises at most 70, in particular at most 40% and preferably at most 20% of the cross-sectional area.
  • the method comprises at least the following steps:
  • Subarea of the outer zone close to the border, at least 20, preferably at least 40, is higher than the average second outflow velocity of the fluid flow in the central zone.
  • the method is directed to redirecting conventional pipe flow (with slower fluid flow in the near-wall region) such that downstream of the honeycomb body the fluid flow flows faster in the near-wall region than in the central region of the fluid line.
  • This deflection of the fluid flow also causes heat of the fluid flow over the wall of the fluid line can be withdrawn to a greater extent.
  • the method or the honeycomb body can also be adjusted so that an inverse effect is set, ie a focused inward deflection with a corresponding increase in the outflow velocity in the central zone.
  • the method can be used in particular for the initially mentioned processes. Consequently, the method proposed here for influencing a fluid flow is, in particular, one associated with: a Fischer-Tropsch synthesis
  • honeycomb body or possibly also a plurality of honeycomb bodies
  • the honeycomb body can be made with the materials durable for the above processes, e.g. B. of metal or ceramic (possibly also with a rapid-proto type method or a layer-pressure method).
  • the method is therefore not directed to equalizing the flow velocities.
  • an unequal Division of the flow velocity can be achieved, wherein in the region near the wall higher flow velocities than in a central zone should be present.
  • average flow rate is meant the average flow rate of the fluid flow in the outer zone and the central zone, respectively, for purposes of illustrating the outer zone and the central zone It is also possible to use as a limit the range at which a significant drop in the flow velocity of the fluid flow near the wall is to be identified Irregularity (eg, a central crush zone and / or a winding hole), the central zone should extend at least over twice the diameter of this irregularity.
  • the honeycomb body is designed substantially cylindrical.
  • cuboid, polygonal, conical or other embodiments are also possible.
  • the honeycomb structure is formed by at least one structured metallic layer which forms a cross-sectional area on the end faces of the honeycomb body (fluid inlet side and fluid outlet side) with channels through which the fluid flow from the fluid inlet side to the fluid outlet side can flow.
  • the honeycomb structure can also be formed by ceramic materials, which are usually used for producing honeycomb bodies, for. B. for the treatment of exhaust gases from internal combustion engines, are provided.
  • the embodiment with at least one metallic layer is more advantageous since the particularly advantageous embodiments (helical winding, Guiding surfaces for effective deflection, openings) can be produced more cost-effectively with the same performance.
  • the at least one structured metallic layer is in particular made of a corrosion-resistant, heat-resistant alloy (eg a steel alloy with proportions of chromium, nickel and aluminum, eg material numbers 1.4767, 1.4725 according to standard EN 10027-2: 1992-09 ) and has a thickness of 10 ⁇ [microns] to 100 ⁇ .
  • a corrosion-resistant, heat-resistant alloy eg a steel alloy with proportions of chromium, nickel and aluminum, eg material numbers 1.4767, 1.4725 according to standard EN 10027-2: 1992-09
  • the honeycomb structure has in particular a cell density of 10 to 1000 cpsi (cells per square inch).
  • the honeycomb structure extends to the outer boundary of the honeycomb body.
  • the outer boundary forms a housing of the honeycomb body and is connected to the fluid line or forms the wall of the fluid line (at least in the region of the honeycomb body).
  • the at least one metallic layer is wound spirally.
  • the honeycomb structure is made up of exactly one single smooth and one single structured metallic layer, which spirally wound on one another extend from the inside to the outside radially.
  • metallic layers are folded and then wound spirally.
  • this single smooth and individual structured layer form the entire honeycomb structure.
  • the fluid flow is at least partially catalytically converted during the flow through the honeycomb body by a catalytic coating of the honeycomb body.
  • an exothermic reaction takes place here, so that the average temperature of the fluid flow downstream of the honeycomb body is significantly increased compared to the average temperature of the fluid flow upstream of the honeycomb body (more than 100 K [Kelvin] difference).
  • the average temperature of the fluid flow increases by 30 K per 100 mm [millimeter] of honeycomb body length (along the axis).
  • the catalytic coating comprises a washcoat so that the effective surface area of the honeycomb structure for contacting the fluid flow is further increased.
  • the catalytic coating comprises (exclusively) oxidizing catalysts which catalyze highly exothermic reactions.
  • the method is particularly suitable, it is not limited to the processes mentioned above.
  • the method can also be used in the context of a heat exchanger process. It can be z. B. a fluid flow can be catalytically implemented within the honeycomb body, wherein due to the exothermic reaction, the fluid flow is heated. This heat is transported through the honeycomb body to the wall of the fluid line and can be used from there to heat a medium or an environment outside the fluid line.
  • the honeycomb body is formed essentially of alternating smooth and structured metallic layers, wherein the smooth metallic layers at least openings and the structured metallic layers at least Strö- have mungsleit vom.
  • both smooth and structured layers may have openings and flow guide surfaces.
  • all the flow guide surfaces in the honeycomb body are aligned in the same way, that is, the fluid flow is transferred in the same way from a channel at least partially out into an adjacent channel.
  • the openings are preferably round.
  • the openings preferably have a radius which is at least 50, in particular at least 100% and very particularly preferably at least 170% of the cross-sectional width of the channel of the honeycomb body.
  • it is preferred that the aperture have a radius in the range of 5 to 13 mm [millimeters], especially in the range of 7 to 10 mm.
  • the structured metallic layers have flow guide surfaces which all deflect the fluid flow in a common direction (eg radially outward or into a further radially outer channel).
  • at least four, preferably at least eight, or even at least eleven, flow-guiding surfaces per 150 mm length of the channel of the honeycomb body (along the axis) are arranged one behind the other in each channel.
  • the distance between two flow guide surfaces within a channel is at least 10 mm [millimeter], preferably at least 12 mm.
  • the length of a flow guide surface (along the axis from the beginning to the end of a single flow guide surface) is at least 3 mm, in particular at least 7 mm.
  • flow guide surfaces are arranged in all channels.
  • a flow guide surface extends so far into a channel that at least 60% of the channel cross-sectional area is obscured by the flow guide surface.
  • the flow guide thus extends from the channel wall into the interior of the channel, so that the fluid flow in Channel meets the flow guide and is deflected.
  • at least 25%, preferably at least 40%, of the fluid flow is led out of a channel per flow-guiding surface.
  • the number of flow guide surfaces per channel is also approximately constant (eg maximum +/- 2) and / or the shape of all flow guide surfaces is the same.
  • the above parameters for the arrangement of the flow guide is particularly advantageous. A maximum diversion of the fluid flow is achieved and, in particular, the pressure loss during the flow through the honeycomb body is kept low.
  • the average second inflow velocity of the fluid flow in the central zone is larger by a factor of 2 to 3 than the average first inflow velocity of the fluid flow in the boundary-proximal outer zone.
  • the average first outflow velocity of the fluid flow is at least 20%, in particular at least 40%, preferably 100% to 400% higher than the average second outflow velocity of the fluid flow in the central one in at least one partial area or in the entire outer zone bordering on the outer zone Zone.
  • the average first outflow velocity of the fluid flow in at least one partial area or in the entire outer zone close to the limit is very particularly preferably 200% to 400%, in particular 300% to 400%, higher than the average second outflow rate of the fluid flow in the central zone.
  • honeycomb body for use in the inventive method, wherein the honeycomb body has a fluid inlet side and a fluid outlet side and an outer boundary.
  • the honeycomb body points to a fluid flow from the fluid inlet side to the fluid outlet side flow through channels.
  • the channels ie the channel walls forming the channels
  • the channels have at least partially openings and flow guide surfaces for deflecting the fluid flow in a radial outward direction and at least partially a catalytic coating.
  • the honeycomb body has at least one at least partially structured metallic layer, which in particular forms the channels.
  • the at least one metallic layer at least partially has openings and flow guide surfaces for deflecting the fluid flow in a radial direction to the outside and at least partially a catalytic coating.
  • the comments on the method according to the invention apply equally to the honeycomb body and vice versa.
  • it is proposed, in particular, to deflect a fluid flow radially outward in such a way that a large proportion of the fluid flow flows over the largest possible catalytically active surface and, secondly, a large proportion of the heat generated as a result of the catalytic reaction flows via the fluid line downstream of the honeycomb body is discharged outside.
  • These goals can be influenced by the adapted configuration of the honeycomb body.
  • a stronger deflection within the honeycomb body increases on the one hand the average first outflow velocity in the boundary-near zone, whereby the catalytically active surface overflowed by the fluid flow is thereby reduced (the surfaces of the central zone in the downstream part of the honeycomb body are reduced only by small amounts) Fluid flow overflowed).
  • FIGS. show particular embodiments, to which the invention is not limited.
  • the figures and especially the sizes shown in the figures are only schematically. Show it:
  • Fig. 1 honeycomb body in a fluid line in section
  • FIG. 2 shows a honeycomb body in a side view in section; a honeycomb body in cross section; 4 shows several layers of a honeycomb structure in a perspective view;
  • FIG. 5 shows a preferred embodiment variant of a honeycomb body in cross section
  • FIG. 6 shows a preferred embodiment variant of a honeycomb structure in a perspective view.
  • Fig. 1 shows a plurality of honeycomb body 4, which are arranged one behind the other in the flow direction along an axis 23 in a fluid line 2.
  • the fluid line 2 has a wall 3, which comprises the individual honeycomb body 4 directly.
  • a fluid flow 1 flows along the axis 23 through the fluid line 2 to the honeycomb body 4.
  • the flow velocities 24 of the fluid flow 1 in the fluid line 2 are illustrated. It can be seen that the flow velocities 24 are smaller in the vicinity of the wall than in the middle of the fluid line 2. It is approximately the usual profile of flow velocities 24 in a fluid line 2 (pipe flow).
  • the fluid flow 1 enters the first honeycomb body 4 via a fluid inlet side 5.
  • the honeycomb structure 8 of the honeycomb body 4 is constructed such that the fluid flow 1 is deflected outward in a radial direction 16, starting from the axis 23.
  • the fluid flow 1 exits the fluid outlet side 6 of the honeycomb body 4 again, whereby the profile of the flow velocities 24 changes. dert has (see comments on Fig. 2).
  • the flow through the second honeycomb body 4 takes place equally.
  • the design of the fluid line 2 is performed here only by way of example with conical sections 25.
  • Honeycomb bodies 4 can also be arranged in such conical sections 25 and then have correspondingly conical honeycomb structures 8.
  • Fig. 2 shows a honeycomb body 4 in a side view in section, wherein the profiles of the flow velocities 24 are shown in detail here.
  • the honeycomb body 4 has an outer boundary 11, which can also represent the wall 3 of the fluid line 2.
  • the outer boundary 11 is a housing, to which the honeycomb structure 8 is connected, so that a honeycomb body 4 is formed.
  • This honeycomb body 4 can be used in fluid lines 2.
  • the fluid flow 1 has a profile of the flow velocities 24 at the fluid inlet side 5 of the honeycomb body 4, which corresponds to the profile of a pipe flow.
  • a peripheral outer zone 12 close to the boundary a lower average first inflow velocity 14 exists and in a central zone 13 surrounded by the outer zone 12 a larger average second inflow velocity 15.
  • the honeycomb structure 8 of the honeycomb body 4 is formed by layers 7 which form channels 10 through which fluid flow 1 can flow.
  • the layers 7 have openings 21 and flow guide surfaces 22.
  • the flow guide surfaces 22 and openings 21 effect a deflection of the fluid flow 1 within the honeycomb structure 8 in a radial direction 16 outwards, starting from the central one Axis 23, towards the outer boundary 11.
  • the fluid flow 1 is thus transferred from a channel 10 via openings 21 and through flow guide surfaces 22 into adjacent channels 10.
  • the fluid flow 1 at the fluid outlet side 6 of the honeycomb body 4 has a changed profile of the flow velocities 24.
  • the average first outflow velocity 17 in the boundary-near outer zone 12 is at least 20% greater than the average second outflow velocity 19 of the fluid flow 1 in the central zone 13.
  • the flow guidance surfaces 22 each have a length 27 (measured parallel to the axis 23) and are arranged at a distance 28 from each other (along the axis 23).
  • the fluid flow 1 is thus deflected by the honeycomb body 4 toward the outer boundary 11 or towards the wall 3 of the fluid line 2. This deflection leads to a more intensive contact between fluid flow 1 and inner surface 26 of the wall 3, so that heat is released from the fluid flow 1 to a greater extent on the wall 3, or discharged via the wall 3.
  • Fig. 3 shows a honeycomb body 4 in cross section.
  • the honeycomb body 4 has an outer boundary 11 and, within the outer boundary 11, a honeycomb structure 8 which is formed by spirally wound, smooth and structured (here corrugated) metallic layers 7.
  • the honeycomb structure 8 has channels 10 with channel cross-sectional areas 29.
  • the layers 7 have openings 21 and flow-guiding surfaces 22, through which the fluid flow 1 is transferred from a channel 10 into respectively adjacent channels 10 (see arrows of the flow-through windings 24).
  • the outer zone 12 adjoining the outer boundary 11 comprises at most 20% of the entire cross-sectional area 9 of the honeycomb structure 8.
  • the deflection of the fluid flow 1 within the honeycomb structure 8 can also take place such that only at least in a partial area 18 of the outer zone 12 close to the boundary there is an increased average first outflow rate 17 that is at least 20% faster than the average second outflow rate 19 in the central zone 13.
  • 4 shows a plurality of layers 7 of a honeycomb structure 8 in a perspective view. Smooth and structured layers 7 are arranged on top of each other so that channels 10 are formed, through which the fluid flow 1 flows from a fluid inlet side 5 to a fluid outlet side 6.
  • the layers 7 have a coating 20.
  • the structured layer 7 has openings 21 and flow guide surfaces 22, so that the fluid flow 1 is transferred from one channel 10 into an adjacent channel 10.
  • the smooth layer 7 here has only openings 21, which interact in particular with the flow guide surfaces 22 of the structured layer 7, so that a stronger deflection of the fluid flow 1 within the honeycomb structure 8 is achieved. It should be noted that the smooth layer 7 openings 21 and 22 may have flow baffles.
  • the honeycomb structure 8 is formed by a smooth and a structured (corrugated) metallic layer 7, which, stacked on top of each other (ie two layers 7), extend along the helical line from inside to outside towards the outer boundary.
  • the layers 7 are formed as shown in Fig. 6.
  • Fig. 6 shows a preferred embodiment of a honeycomb structure 8 in a perspective view.
  • Smooth and structured layers 7 are arranged on top of each other so that channels 10 are formed through which the fluid flow 1 flows from a fluid inlet side 5 to a fluid outlet side 6.
  • the layers 7 have a coating 20.
  • the structured layer 7 has openings 21 and flow guide surfaces 22, so that the fluid flow 1 is transferred from a channel 10 into an adjacent channel 10.
  • the smooth layer 7 here has only openings 21 (not visible), which interact in particular with the flow guide surfaces 22 of the structured layer 7, so that a stronger deflection of the fluid flow 1 within the honeycomb structure 8 is achieved.
  • the structured layer 7 has openings 21 and flow guide surfaces 22 (partly in arranged in a cooperative manner), so that the fluid flow 1 in each case leads in a same radial direction 16 via an opening 21 in the smooth layer 7 into a channel 10 of an adjacent structured layer 7.
  • the combinations of technical features shown in the figures are not generally mandatory.
  • technical features of a figure can be combined with other technical features of another figure and / or the general description.
  • Like reference numerals in the figures indicate like objects.
  • honeycomb body By the method described and the honeycomb body, it is possible to realize a particularly cost effective and effective flow control. In particular, an effective heat transfer from the fluid flow 1 to / via the outer boundary 11 or via the wall 3 can thus be achieved. Furthermore, a honeycomb structure enables a large effective surface area for a catalyst to be provided. This is all the more true if a washcoat 20 is arranged on the layers 7, which carries the catalytically active components on the thus further enlarged surface.
  • the honeycomb body 4 thus enables an effective deflection and thus improved heat dissipation and an effective catalytic conversion of a fluid flow 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

L'invention concerne un procédé permettant d'agir sur l'écoulement (1) d'un fluide dans une conduite de fluide (2). La conduite de fluide présente une paroi (3), et un corps alvéolaire (4) présentant un côté entrée de fluide (5) et un côté sortie de fluide (6) est agencé dans la conduite de fluide (2). Le corps alvéolaire (4) présente une structure alvéolaire (8) présentant une surface de section transversale (9) et des canaux (10) pouvant être parcourus pour l'écoulement (1) du fluide du côté entrée de fluide (5) vers le côté sortie de fluide (6), le corps alvéolaire (4) présentant une délimitation extérieure (11), la structure alvéolaire (8) présentant une zone extérieure (12) périphérique proche de la délimitation et une zone centrale (13) agencée à l'intérieur de la zone extérieure (12), la zone extérieure (12) comprenant au plus 70 % de la surface de section transversale (9). Le procédé comprend au moins les étapes suivants : a) mise à disposition de l'écoulement (1) du fluide en amont du corps alvéolaire (4), b) entrée de l'écoulement (1) du fluide dans le corps alvéolaire (4), au niveau du côté entrée de fluide (5), la vitesse d'entrée (14) de l'écoulement (1) du fluide dans la zone extérieure (12) proche de la délimitation étant inférieure à la vitesse d'entrée (15) de l'écoulement (1) du fluide dans la zone centrale (13), c) déviation au moins partielle de l'écoulement (1) du fluide dans une direction radiale (16) vers l'extérieur, de sorte que, au niveau du côté sortie de fluide (6), une première vitesse de sortie (17) de l'écoulement (1) du fluide est dans au moins une partie (18) de la zone extérieure (12) proche de la délimitation au moins 20 % supérieure à une seconde vitesse de sortie (19) de l'écoulement (1) du fluide dans la zone centrale (13).
EP15720643.4A 2014-04-24 2015-04-23 Procédé permettant d'agir sur l'écoulement d'un fluide Withdrawn EP3134626A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014105770.8A DE102014105770A1 (de) 2014-04-24 2014-04-24 Verfahren zur Beeinflussung einer Fluidströmung
PCT/EP2015/058782 WO2015162202A1 (fr) 2014-04-24 2015-04-23 Procédé permettant d'agir sur l'écoulement d'un fluide

Publications (1)

Publication Number Publication Date
EP3134626A1 true EP3134626A1 (fr) 2017-03-01

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EP15720643.4A Withdrawn EP3134626A1 (fr) 2014-04-24 2015-04-23 Procédé permettant d'agir sur l'écoulement d'un fluide

Country Status (5)

Country Link
US (1) US10161280B2 (fr)
EP (1) EP3134626A1 (fr)
CN (1) CN106255812A (fr)
DE (1) DE102014105770A1 (fr)
WO (1) WO2015162202A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019212149B4 (de) * 2019-08-13 2021-05-27 Vitesco Technologies GmbH Katalysator zur Abgasnachbehandlung

Citations (1)

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WO2015162202A1 (fr) 2015-10-29
DE102014105770A1 (de) 2015-11-12

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