JPS57113369A - Simultaneous measurement of flow speed density and turbulence by three current meters - Google Patents

Simultaneous measurement of flow speed density and turbulence by three current meters

Info

Publication number
JPS57113369A
JPS57113369A JP92681A JP92681A JPS57113369A JP S57113369 A JPS57113369 A JP S57113369A JP 92681 A JP92681 A JP 92681A JP 92681 A JP92681 A JP 92681A JP S57113369 A JPS57113369 A JP S57113369A
Authority
JP
Japan
Prior art keywords
turbulence
rho
flow
value
density
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.)
Pending
Application number
JP92681A
Other languages
Japanese (ja)
Inventor
Rikiya Takeda
Fumihide Takeda
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP92681A priority Critical patent/JPS57113369A/en
Publication of JPS57113369A publication Critical patent/JPS57113369A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G01P5/06—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes

Abstract

PURPOSE:To make it possible to conduct simulaneous measurements of flow speed, vicosity, density and turbulence by a field test, by conducting numerical calculation on the basis of the Gauss-Newton law by using rotations measured by three current meters and a digital calulator. CONSTITUTION:A rotation of an impeller of a current meter in non-turbulent flow is to be N, and that in turbulent is to be NT. When a flow velocity is to be V, NT is to become N[1-CT/(V-AT)]. AT and CT are constants to be decided by degree of turbulence TF, and structure of the current meter is specially designed so that the constants are not affected by variations of dimensional values and physical values of the impeller. A density is to be rho, and a vector of X=(V,TF,rho) is to be introduced. The above equation is re-written to fn(X)= NTn-Nn[1-CTn/(V-ATn)], a value is sought by a calculatin in accordance with the Gauss-Newton law by using a microprocesser, and a calculation is continuosly executed starting from an itinial estimated value X0 until a real value X1 is obtained. This value gives approximations of V, TF, rho of the flow at the same time.
JP92681A 1981-01-06 1981-01-06 Simultaneous measurement of flow speed density and turbulence by three current meters Pending JPS57113369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP92681A JPS57113369A (en) 1981-01-06 1981-01-06 Simultaneous measurement of flow speed density and turbulence by three current meters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP92681A JPS57113369A (en) 1981-01-06 1981-01-06 Simultaneous measurement of flow speed density and turbulence by three current meters

Publications (1)

Publication Number Publication Date
JPS57113369A true JPS57113369A (en) 1982-07-14

Family

ID=11487289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP92681A Pending JPS57113369A (en) 1981-01-06 1981-01-06 Simultaneous measurement of flow speed density and turbulence by three current meters

Country Status (1)

Country Link
JP (1) JPS57113369A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014302A (en) * 1983-07-05 1985-01-24 Toshiba Corp Automatic control method of pi control parameter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014302A (en) * 1983-07-05 1985-01-24 Toshiba Corp Automatic control method of pi control parameter

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