Application Cases

Experiment Name: Application of High-Voltage Amplifier in Ultrasonic Measurement of Air-Liquid Interface Fluctuations in Jet Flow

Experiment Content:
By driving an ultrasonic generator with a high-voltage amplifier, the acoustic field changes caused by air-liquid interface fluctuations in jet flow are measured. Based on the principle of ultrasonic scattering, this method enables the measurement of air-liquid interface fluctuations in jet flow.

Research Direction: Aerospace Engine Measurement Technology

Test Equipment: ATA-2082 high-voltage amplifier, ultrasonic generator, ultrasonic receiver, data acquisition card, signal amplifier, computer, etc.

Figure 1: Experimental Framework Diagram

Experimental Process:

Figure 2: Physical Setup of the Experiment

The experimental system mainly consists of an ultrasonic generator and a high-voltage amplifier, an ultrasonic receiver and a signal amplifier, a data acquisition card, LabView software, and a computer terminal. During the experiment, modulated electrical signals are generated using LabView software and an NI data acquisition card, which are then transmitted to the ATA-2082 high-voltage amplifier to excite the ultrasonic generator and produce ultrasonic waves. Subsequently, changes in both the images and acoustic field information caused by the jet flow are captured using a high-speed camera and an ultrasonic receiver, respectively. Through subsequent data processing, the measurement of the air-liquid interface in jet flow is achieved.

Experimental Results:

Figure 3: Experimental Results

By analyzing the data collected from the high-speed camera and ultrasonic measurements, the focus was on extracting energy from the acoustic wave signals to obtain parameters related to the fluctuations of the air-liquid interface in jet flow. The results from the two measurement methods were compared, as shown in the figure. The maximum error of the ultrasonic measurement results was 0.601 mm, with an average measurement error of 0.116 mm. Additionally, when using the measurements from the high-speed camera as a reference, the maximum relative error of the ultrasonic measurement results was 30.9%, with an average relative measurement error of 2.1%. The results from the two methods demonstrated good consistency.

Recommended High-Voltage Amplifier: ATA-2082

Figure: ATA-2082 High-Voltage Amplifier Specifications

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