Fluid flow meter with a body having upstream and downstream conical portions and an intermediate cylindrical portion
View Patent ↗A mass flow meter device utilizing a housing having a wall portion forming a chamber with an entrance and exit for passing fluid through the same. A body is located within the chamber and is composed of a first conical portion, a second conical portion, and a cylindrical portion positioned intermediate the first and second conical portions. The body is held within the chamber in a standard or reverse direction. A first pressure probe or sensor measures the fluid pressure at the apex of the first conical portion while a second pressure probe or sensor obtains a second pressure measurement at the cylindrical portion of the body. The comparison of the first and second pressure measurements serves as an indication for the mass flow of fluid through the housing.
1. A fluid mass flow meter device, comprising:
a. a housing having a wall portion forming a chamber, said chamber possessing an entrance and an exit for passing fluid through said chamber;
b. a body located in said chamber said body including a first conical portion positioned adjacent said chamber entrance, a second conical portion positioned adjacent said chamber exit and a cylindrical portion intermediately positioned relative to said first and second conical portions;
c. support means for holding said body within said chamber;
d. a first pressure probe, said first pressure probe obtaining a first pressure measurement at the apex of said first conical portion of said body; and
e. a second pressure probe, said second pressure probe obtaining a second pressure measurement at said cylindrical portion of said body.
2. The device of claim 1 in which said housing wall comprises a right circular cylinder having a central axis, said body lying along a central axis, said central axis of said body being coincident with said central axis of said right circular cylinder.
3. The device of claim 1 in which said wall portion of said housing further includes an outer surface and an inner surface surrounding said chamber and said support means for holding said body in said chamber comprises a projection depending from and connected to said inner surface of said housing.
4. The device of claim 1 in which said first and second pressure probes include a first and second passageway, respectively through said support means.
5. The device of claim 4 in which said support means comprises a projection depending from said inner wall of said housing.
6. the device of claim 4 in which said first and second passageways each terminate in an aperture within said housing chamber.
7. The device of claim 6 in which said aperture of said first passageway faces said entrance to said chamber and said aperture of said second passageway faces said exit to said chamber.
8. The device of claim 6 in which said aperture of said second passageway faces said entrance to said chamber and said aperture of said first passageway faces said exit to said chamber.
9. The device of claim 1 in which said body with said chamber is formed into an annulus for the passage of fluid therethrough.
10. The device of claim 9 in which said housing wall comprises a right circular cylinder having a central axis, said body lying along a central axis, said central axis of said body being coincident with said central axis of said right circular cylinder.
11. The device of claim 9 in which said wall portion of said housing further includes an outer surface and an inner surface surrounding said chamber and said support means for holding said body in said chamber comprises a projection depending from said inner surface of said housing.
12. The device of claim 9 in which said first and second pressure probes include a first and second passageway, respectively through said support means.
13. The device of claim 12 in which said support means comprises a projection depending from and connected to said inner wall of said housing.
14. the device of claim 12 in which said first and second passageways each terminate in an aperture within said housing chamber.
15. The device of claim 14 in which said aperture of said first passageway faces said entrance to said chamber and said aperture of said second passageway faces said exit to said chamber.