TY - GEN
T1 - Simultaneous measurements of flow-induced noise and two-phase flow regime in expansion valves
AU - Zhang, Yingyue
AU - Elbel, Stefan
N1 - Funding Information:
The authors would like to thank the member companies of the Air Conditioning and Refrigeration Center (ACRC) at the University of Illinois at Urbana-Champaign for their financial and technical support and Creative Thermal Solutions, Inc. (CTS) for their technical support.
Publisher Copyright:
© 2019 International Institute of Refrigeration. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Flow-induced noise generated by the expansion devices is disturbing to the user because of its high-frequency properties. In the paper, a pumped R134a loop and the simultaneous measurements including the accelerometer, the microphone, the high-speed pressure transducer, and the high-speed camera are utilized. Thus, the flow-induced noise can be related to specific flow movements recorded by the camera. The observed frequency range of the gurgling noise is between 7.5 kHz to 10 kHz, whereas that for the hissing noise is above 10 kHz. The gurgling noise is generated by the flow oscillating movement whereas the hissing noise is caused by the flow-structure interaction. The hissing noise can be enhanced by the structural modes and exists in all kinds of flow regimes. The gurgling noise only exists when TXV inlet has two-phase flow. The acceleration signal matches the microphone signal and the accelerometer can be used to simulate the flow-induced noise.
AB - Flow-induced noise generated by the expansion devices is disturbing to the user because of its high-frequency properties. In the paper, a pumped R134a loop and the simultaneous measurements including the accelerometer, the microphone, the high-speed pressure transducer, and the high-speed camera are utilized. Thus, the flow-induced noise can be related to specific flow movements recorded by the camera. The observed frequency range of the gurgling noise is between 7.5 kHz to 10 kHz, whereas that for the hissing noise is above 10 kHz. The gurgling noise is generated by the flow oscillating movement whereas the hissing noise is caused by the flow-structure interaction. The hissing noise can be enhanced by the structural modes and exists in all kinds of flow regimes. The gurgling noise only exists when TXV inlet has two-phase flow. The acceleration signal matches the microphone signal and the accelerometer can be used to simulate the flow-induced noise.
KW - Flow regimes
KW - Flow visualization
KW - Flow-induced noise
KW - Gurgling noise
KW - Hissing noise
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U2 - 10.18462/iir.icr.2019.0445
DO - 10.18462/iir.icr.2019.0445
M3 - Conference contribution
AN - SCOPUS:85082704563
T3 - Refrigeration Science and Technology
SP - 813
EP - 820
BT - ICR 2019 - 25th IIR International Congress of Refrigeration
A2 - Minea, Vasile
PB - International Institute of Refrigeration
T2 - 25th IIR International Congress of Refrigeration, ICR 2019
Y2 - 24 August 2019 through 30 August 2019
ER -