2015
DOI: 10.4271/2015-01-2275
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Flow-Induced Whistle in the Joint of Thermal Expansion Valve and Suction Tube in Automotive Refrigerant System

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Cited by 7 publications
(6 citation statements)
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“…According to Koberstein et al (2015) results, TVX pilot suction tube lengths inferior to 9.0 mm, chamfered pilot tubes, and smoothed TXV suction port edges can suppress the noise at 6.18 kHz while the SPL remained similar at other frequencies. Although Koberstein et al (2015) identified a clear relation between the flow-induced noise and the shallow cavity between the TXV and the suction pilot tube, a mechanistic explanation about how this relationship is established was not given by them. Zhang and Elbel (2018) found that increasing the TXV wall thickness by 0.2 mm the natural frequency of the structure increases, therefore the hissing noise that was propagated through the TXV wall around 10 kHz could be mitigated.…”
Section: Thermal and Electric Expansion Valvementioning
confidence: 89%
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“…According to Koberstein et al (2015) results, TVX pilot suction tube lengths inferior to 9.0 mm, chamfered pilot tubes, and smoothed TXV suction port edges can suppress the noise at 6.18 kHz while the SPL remained similar at other frequencies. Although Koberstein et al (2015) identified a clear relation between the flow-induced noise and the shallow cavity between the TXV and the suction pilot tube, a mechanistic explanation about how this relationship is established was not given by them. Zhang and Elbel (2018) found that increasing the TXV wall thickness by 0.2 mm the natural frequency of the structure increases, therefore the hissing noise that was propagated through the TXV wall around 10 kHz could be mitigated.…”
Section: Thermal and Electric Expansion Valvementioning
confidence: 89%
“…Therefore, these authors were able to verify that for EEV aperture inferior to 200 steps sub-cooled liquid leaves the condenser leading to an inferior SPL than for 300 steps aperture, when two-phase flow leaving the condenser was observed. Koberstein et al (2015) identified an intense whistle noise source at 6.18 kHz in phase with the accelerometer at the suction line of TXV. In order to understand the effect of the inlet TXV geometry on the frequency noise band, Koberstein et al (2015) varied the TVX pilot suction tube length from 8.0 to 12.0 mm (Fig.…”
Section: Thermal and Electric Expansion Valvementioning
confidence: 99%
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