PAST PROBLEMS OF TURBINES WHICH LED TO TECHNOLOGY ADVANCES”
The feature article, “Past problems of turbines, which led to technology advances,” by Neville.Rieger provides an insight knowledge into where many vibrations problems affecting turbines and other rotating machinery came from. It appeared in three different publications: Vibration Institute’s June 2001 and also in spring and Summer 2017 magazines. This review focuses on an article in Mr. Neville Rieger spring 2017 magazine.
To begin with, rotor dynamics of shaft systems and destructive vibrations of spinning disks are the two problems discussed by Neville F. Rieger. The advancement of rotor dynamics of the shaft system began back in 1869 by an introduction of “critical speed” by Rankine. In addition, there was an introduction of pulse steam turbine in 1883-1897. In 1883-1905 there was an introduction of bearings and lubricants, direct current dynamos were introduced in 1880-1885. By publishing “the results of extensive theoretical and experimental studies (1885)”, Dunkenly (3) greatly extended knowledge of critical speed and shafting systems. Rankline’s idea “critical speed” was firmly entrenched by 1905. There was a paper that talked about the instability of “critical speed “but this was cleared by Dunkerly’s paper in 1894. By 1919 the principles of shaft dynamics were finally established.PAST PROBLEMS OF TURBINES WHICH LED TO TECHNOLOGY ADVANCES
Furthermore, Winfred Campbell of the General Electric Company in 1924 published the results of a three-year investigation into the catastrophic failure of steam turbines disks. After observing several cases Campbell concluded that, “the disk was being excited into resonance as its forward speed coincided with that of the backward circumferential, and that this resonance could be caused by an irregular distribution of circumferential discharges around the diaphragm circumference.” This was backed up by the fact that any irregular pattern can be reduced to a series of Fourier harmonic waves. It is evident that Campbell’s spinning disk experiments have been repeated by many researchers.
In conclusion, it is clear that by embarking on the past problems facing turbines solutions have come up, thus leading to the advancement of technology. Moreover, everything has its history from this article it is evident that over the past years there is a great advancement in the world of turbines. Neville F. Rieger gives a brilliant chronological of events in his article. Lastly, the Neville F. Rieger way of tackling the problem after its occurrence it is quite a recommendable way of solving problems but it is also risky if the occurrence of the problem endangers human life.PAST PROBLEMS OF TURBINES WHICH LED TO TECHNOLOGY ADVANCES