US2340181A

US2340181A - Fluid turbulizer

Info

Publication number: US2340181A
Application number: US485038A
Authority: US
Inventors: Geddes Walter Hayward
Original assignee: United Aircraft Products Inc
Current assignee: United Aircraft Products Inc
Priority date: 1943-04-29
Filing date: 1943-04-29
Publication date: 1944-01-25
Anticipated expiration: 1961-01-25

Description

Jan. 25, 1944. w. H. GEDDES FLUID TURBULIZERS Filed April 29, 1943 Patented Jan. 25, 1944 UNITED STATES PATENT OFFICE FIiUID-TURBULIZER Walter HaywardGeddes, Dayton, Ohio, assignor to United. Aircraft Products, Inc.,, Dayton, Ohio, 2. corporation'of Ohio: Application ApriL29, 1943,,Serial No. 485,038

8'Claims.

'I'hisinventionrelates to heat exchangeapparatus, and has'particular referenceto. improvements in heat exchange apparatus of the. type including a tube through which a liquid or other fluid to becooled; or heated,.flows and which. is

cooled, or heated, as the. case'may be, byxexchange: of' heat, through the wall of the tube,

between the fluid andia suitable. cooling, or heating, mediumexteriorly of the tube.

Generallyxspeaking, theobjectof theinvention.

is to provide, in apparatus of thetype mentioned,

simple practical means within the'tube to break up and turbulize the fluid flowing through the tube: and to effect a rapid exchange of heat be.- tween the fluid and the tube, whereby the entire body of the fluid is substantially uniformly cooled,.or heated, and, at thexsame: time, is exceptionally rapidly cooled, or heated, as the case may be.

With th foregoing'andiother objectsin' View, whichwill become more fully apparent as" the nature of the invention is better understood, the same consists in heat exchange: apparatus em-- bodying the novel features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated. in the accompanying drawing and defined in the appended claims.

In the accompanying drawing, wherein like characters of reference denote corresponding partssin different views:

Figure l is'a front elevation of 'a heat exchange unit embodying the features of the invention.

Figure 2' is a side elevation ofthe unit'shown in Figure. 1.

Figure3 is a longitudinal section on an enlarged scalethrough one of the tubes of the unit shown inFigures 1 and 2; and

Figure 4 is a transverse section on the. line 4-4'0f. Figure 3;

In Figures 1 and 2 of the drawing there has been illustrated by way of example a heat ex change unit comprising a pair of tanks land I l which are connected together'by a plurality of tubes I2 of flattened elongated form in transverse" Inthis unit the fluid to be cooled; or

section; heated, is supplied to one of the tanks l0or H;

flows through the tubes I2 to the other tank and delivered from the latter tank, being cooled. or heated, during its flow through the tubes 2 by exchange of heat through said tubes,

arranged therein an element or elements in accordance with the invention for the purpose of breakingup and turbulizingia fluidflcwing therethrough. and for efiecting rapid=transfer of heat 1 between the fluid and the tube'whereby thorough and rapid cooling, or heating; of the fluid, is

efiected byacooling,1or heating, medium-circulated over the tube exteriorly thereof.

Accordingly, referring: particularly to Figs. 2

2 and 3,.wherein the tube I2 is representative of any'tube. through which flows afluidto be cooled orheated by'exchangeof he'at,.through the tube, between the fluid and a cooling or heating medium'circulated'overthetube exteriorly thereof, it will be observed that withinthetube is a; series oftransversely'undulatedelements l3 which extend transversely across the tube and which are disposed in succession longitudinally'of the tube. It will further be observed that adjacent elements l3 are reversed duplicates of one another and that each of them comprises hill and valley portions I 4 and I5, respectively, which are in.

heat exchangecontact with opposite'sides, respectively, oi? the tubeat points spaced apart transversely of the tube. Moreover, it will be observed that because adjacent elements arereversed, the hills and valleys of e'achelement are opposed to the valleys and hills, respectively, of the element, or elements, next adjacent thereto.-

The elements I 3-may be formed from any suitable heat conductive material and may be of any desired widths and of equal or difierent widths, respectively. Preferably, however, they are formed from sheet material and are of equal widths. Preferably, too, the hills and valleys of adjacent elements are directly opposed. However, any disalinement of the hills and valleys of adjacent elements longitudinally with respect to the tube is withinthe purview of the invention. Moreover, whileadjacent elements may be spaced apart,. they preferably are disposed in edge to edge, heat" conductive contact with one another. Furthermore, while the/tube l2 preferably is of elbngatedflattened" form in transverse section as illustrated'in the drawing, it may be of any other configuration in cross section andthe elementsl3-may;.of course, be adapted" to its particularcross section". In other; Words, the'hills and.-valleys'of the'eleme'ntsl3; instead-of'beingiof equal heights and depths; as' shown inthe drawing, may be of different heights and depths-"to'adapt said elements to fit'into'tubes of circular orelliptical shape incross section, for example,- with the" hills andvalleys in contact with opposite sid'esofthetube; respectively.

Bycontact with" the edges ofthe elements l3 fluid flowing through the. tube I 2 will: be? deflected: and thereby: turbulized to an extent: ttrinsure substantially equal contact of all portions thereof with the walls of said elements and said tube.

In addition, because the elements l3 serve to divide the total body of the fluid into smaller separate bodies, and because said elements I 3 afford considerable areas for the conduction .of heat between the separate bodies of the fluid and the tube, the cooling, or heating, of the fluid by i a cooling, or heating, medium exteriorly of the 7 tube is both substantially uniform and rapid as is apparent. I

From the foregoing description considered in connection with the accompanying drawing it is believed that the features and the advantages of perature changed by exchange of heat through the tube between the fluid and a medium of different temperature exteriorly of the tube, and undulated elements of heat conductive material within said tube and in contact with opposite sides thereof at points spaced apart transversely of the tube, said elements being disposed in succession longitudinally of the tube and each element having its undulations disalined longitudinally of the tube from the undulations of the next adjacent element.

2. Heat exchange apparatus including a tube for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of different temperature exteriorly of the tube, said tube having opposed spaced flat surfaces and opposed spaced curved side walls connecting said flat surfaces, and undulated elements of heat conductive material extending transversely of the tube and having contact first with one flat surface and then with the opposite flat surface of the tube at points successively in advance of one another transversely of the tube, said elements being disposed in succession longitudinally of the tube and each element having its undulations opposed to the undulations of the next adjacent element, said elements further having each of its ends contacting an adjacent curved side wall of the tube.

3. Heat exchange apparatus including a tube for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of dif-.

ferent temperature exteriorly of the tube, and undulated elements of heat conductive sheet material extending transversely of the tube and having hill and valley portions in contact with opposite sides of the tube, respectively, at points spaced apart transversely of the tube, said elements being disposed in succession longitudinally of the tube and each element having its hills opposed to the valleys and its valleys opposed to the hills of the next adjacent element.

4. Heat exchange apparatus including a tube for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of different temperature exteriorly of the tube, and undulated elements of heat conductive sheet material extending transversely of the tube and having hill and valley portions in contact with opposite sides of the tube, respectively, at points spaced apart transversely of the tube, said elemnts being disposed in succession longitudinally of the tube in edge to edge abutting relationship and each element having its hills opposed to the valleys and its valleys opposed to the hills of the next adjacent element.

, Heat exchange apparatus including a tube of flattened elongated shape in transverse section for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of different temperature exteriorly of the tube, and undulated elements of heat conductive sheet material extending across said tube substantially from narrower side to narrower side thereof, said elements having hill and valley portions in contact with the wider sides of said tube, respectively, at points successively in advance of one another from one toward the other of the narrower sides of said tube, said elements being disposed in succession longitudinally of the tube and each element having its hills and valleys opposed to the valleys and the hills, respectively, of the next adjacent element.

6. Heat exchange apparatus including a tube of flattened elongated shape in transverse section for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of differenttemperature exteriorly of the tube, and undulated elements of heat conductove sheet material extending across said tube in edge to edge abutting relation from narrower side to narrower side thereof, said elements having hill and valley portions in contact with the Wider sides of said tube, respectively, at points successively in advance of one another from one toward the other of the narrower sides of said tube, said elements being disposed in succession longitudinally of the tube and each element having its hills and valleys disalined longitudinally of the tube from the hillsand valleys of the neXt adjacent element.

7. Heat exchange apparatus including a tube for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of different temperature exteriorly of the tube, and undulated elements of heat conductive material within said tube and in contact with opposite sides thereof at points spaced apart transversely of the tube, said elements being disposed in succession longitudinally of the tube in side to side contacting relation to each other and each element having its undulations disalined longitudinally of the tube from the undulations of the next adjacent element.

'8. Heat exchange apparatus including a tube for flow therethrough of a fluid to have its temperature changed by exchange of heat through the tube between the fluid and a medium of different temperature exteriorly of the tube, and undulated elements of heat conductive sheet material extending transversely of the tube and having hill and valley portions and end portions in contact withopposite sides of the tube, respectively, at points spaced apart transversely of the tube, said elements being disposed in edge to edge abutting relation to each other in succession longitudinally of the tube and adjacent elements being reversed duplicates of one another.

WALTER HAYWARD GEDDES.