Abstract An electrogasdynamic spectral anemometer including a particle injector and a particle collector that are inserted into a turbulent fluid stream that is under investigation. The injector includes a hollow cylinder into which near saturated steam from an outside source is introduced. The injector also includes a nozzle, a corona needle and an attractor ring which are oppositely charged and located within the nozzle. As the steam passes through the nozzle it supersaturates and condenses into droplets having a size that is primarily determined by the condition of the incoming steam. The droplets are then charged through the corona developed between the corona needle and the attractor ring. Then the charged droplets are ejected from the nozzle and into the stream to be measured where they follow its rapid fluctuations. These charged particles move towards the collector which may be placed downstream of the injector. When a charged particle passes the collector it becomes neutralized and transmits an electrical signal into collector circuitry where it is analyzed to provide information about the intensity of the turbulence at various frequencies. Different droplet sizes are used for different turbulent frequencies of interest depending on the maximum value of the frequency present in the flow.
Inventors
👤 O Biblarz
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-03 14:39
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/005; G01P5/006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A device for measuring the dynamic characteristics of a fluid comprising: a. an injector for injecting particles into said fluid; b. a collector for collecting particles injected into said fluid; c. a source of particle material operatively connected to said injector; d. said injector including charging means for electrically charging said particles; and e. means for measuring the charge and frequency of the particles collected by said collector.
Claim 2
Independent Claim
68 words
A device for measuring the dynamic characteristics of a fluid comprising: a. an injector for injecting particles into said fluid; b. a collector for collecting particles injected into said fluid; c. a source of particle material operatively connected to said injector; d. said injector including charging means for electrically charging said particles; and e. means for measuring the charge and frequency of the particles collected by said collector.
Claim 3
Dependent Claim
25 words
The device of claim 1 wherein: a. said particles have a size range from about 10 6 meters to about 10 8 meters in radius.
Claim 4
Dependent Claim
46 words
The device of claim 2 wherein: a. said particles having a linearly decreasing size range of from about 10 5 to about 10 9 meters in radius with a linearly increasing turbulent frequency of said fluid of from about 1 to about 1010 hertz per second.
Claim 5
Dependent Claim
18 words
The device of claim 3 wherein: a. said source of particle material is steam near the saturation point.
Claim 6
Dependent Claim
70 words
The device of claim 1 wherein: a. said injector includes a wall forming a cavity; b. a first opening in said wall for introducing said particle material into said cavity; c. a second opening in said wall for introducing particles into said fluid; d. a corona needle positioned within said cavity and spaced from said second opening; and e. an attractor ring surrounding and forming part of said second opening.
Claim 7
Dependent Claim
30 words
The device of claim 5 wherein: a. said second opening is formed by a nozzle operatively connected to said wall and extending outwardly from the outside surface of said wall.
Claim 8
Dependent Claim
45 words
The device of claim 6 wherein: a. said collector is operatively connected to one side of a capacitor; and b. the other side of said capacitor is operatively connected to a device for measuring the number of particles contacting said collector at a predeterined frequency.
Claim 9
Dependent Claim
33 words
The device of claim 5 wherein: a. said second opening is formed by a nozzle formed in said wall; and b. said attractor being positioned flush with the outside surfAce of said wall.