Resonant modes in sprays
View Patent ↗A system for inspecting spray nozzles includes a nozzle operatively connected to a source of pressurized liquid for issuing a spray from the nozzle. The system also includes a sensor positioned to detect frequencies of resonant modes in the spray. The nozzle and sensor can each be mounted to a spray test booth. A method of inspecting a spray nozzle includes issuing a liquid from a spray nozzle as a spray and using a sensor to detect frequencies of resonant modes in the spray. The sensor can include a diaphragm and detecting frequencies can include impinging at least some of the spray on the diaphragm, and monitoring vibrations of the diaphragm.
1. A method of inspecting a spray nozzle comprising:
issuing a liquid from a spray nozzle as a spray; and
detecting frequencies of resonant modes in the spray with a sensor, further comprising monitoring vibrations of a diaphragm of the sensor, the vibrations being due to the spray impinging upon the diaphragm, wherein the diaphragm is cylindrical, and wherein using a sensor includes impinging a spray cone or multiple discrete jets on an inside surface of the cylindrical diaphragm.
2. The method as recited in claim 1 , further comprising exciting a vibration transducer in operative communication with the diaphragm.
3. The method as recited in claim 2 , further comprising analyzing a signal from the vibration transducer and detecting resonances in the spray.
4. The method as recited in claim 1 , further comprising detecting frequencies with a laser vibrometer in optical communication with the diaphragm.
5. The method as recited in claim 4 , further comprising analyzing the signal from the laser vibrometer to detect resonances in the spray.
6. The method as recited in claim 1 , further comprising impinging a single discrete jet on the diaphragm.
7. A nozzle spray sensing arrangement comprising:
a sensor positioned and configured to sense pulses in a spray of fluid exiting from a nozzle, wherein the sensor includes a diaphragm, wherein the diaphragm is cylindrical and is positioned for impingement of a spray cone or multiple discrete jets from the nozzle on an inside surface of the cylindrical diaphragm.
8. The system as recited in claim 7 , wherein the nozzle and sensor are each mounted to a spray test booth.
9. The system as recited in claim 7 , wherein the sensor includes a vibration transducer connected to the diaphragm for generating a signal indicative of spray incident on the diaphragm.
10. The system as recited in claim 9 , further comprising a spectrum analyzer operatively connected to receive the signal from the vibration transducer to detect resonances in the spray.
11. The system as recited in claim 7 , wherein the sensor includes a laser vibrometer optically connected to the diaphragm for generating a signal indicative of spray incident on the diaphragm.
12. The system as recited in claim 11 , further comprising a spectrum analyzer operatively connected to receive the signal from the laser vibrometer to detect resonances in the spray.
13. The system as recited in claim 7 , wherein the diaphragm is positioned for impingement of a single discrete jet from the nozzle on the diaphragm.