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Modelling and testing of dynamic properties of C0-45 turbochargers

Budzik G., Mazurkow A.

Zeszyty Naukowe. Transport / Politechnika Śląska

2017

z. 97

17--25

The paper presents modelling process and results of the bench tests of the C0-45, which is a turbocharger for heavy-duty diesel engines. For turbochargers like this, it is necessary to measure the level of vibration. This paper presents the test results for 115 turbochargers. Rotor speed during the tests varied between 25,000 and 42,000 rpm. Rotor speed during the tests on a C0-45 turbocharger varied within three ranges, i.e., Range I: n=25,000÷32,000 rpm and a=0.5g; Range II: n=33,000÷38,000 rpm and a=1.0g; Range III: n=39,000÷42,000 rpm and a=1.5g; (g=9.81m/s2). Measurement of vibrations was realized by a sensor located on the body of the turbocharger. Bench tests also included measurement of key charge parameters such as the amount of mass trapped, mean flow velocities, turbulence level, gas pressure, temperature and oil flow. The results are presented in the form of diagrams showing the amplitude of the acceleration function with regard to the rotor’s RPM. Research shows that using the correct parameters in construction and technological processes of assembly are very important for the effective functioning turbochargers.

The Effect of Road Traffic on the Vibrations Level Generated in Buildings on Examples of Measurement in Warsaw Agglomeration

Sadowski J., Chyży T.

Mechanika / Akademia Górniczo-Hutnicza im. St. Staszica

2004

T. 23, z. 2

289-296

In this paper the results of measurements of the vibrations levels on buildings, generated by road traffic, have been described. The measurements points have been localized on the region of the capital town of Warsaw and in neighbouring towns. This results shown that: -in results, according to one-third octave analysis, dominating level of excitation is generated by means of heavy public transport, -the frequency characteristics of vibrations of those means are loca- ted mainly in lower acoustic band.

W artykule przedstawiono wyniki badań poziomów oddziaływań drgań pochodzenia komunikacyjnego na budynki zlokalizowane na terenie miasta stołecznego Warszawy oraz w okolicznych miejscowościach.