Cavitation Intensity Measurements for Internal Combustion Engines

Durability and reliability in diesel engine system design

“…Hosny et al (1996) concluded that cavitation was severe enough to cause damage only at high-speed and high-load conditions. The reason was partly due to the increased peak cylinder pressure and the associated increased piston slap intensity at those conditions.…”

“…In addition to the above macro processes related to the vibration and pressure signals, new detection methods were developed with micro processes that are related to bubble dynamics and collapse in order to detect the liner cavitation intensity. Cavitation intensity or severity was characterized by measuring the high frequency acoustic implosion signals of coolant vapor bubbles on the liner surface (Hosny, 1996;Hosny et al, 1996). The fluid cavitation intensity measured by such a method was found to increase as a function of the liner vibration level.…”

“…The input of the model was the impact force from piston dynamics, and the output of the model was liner vibration and the prediction on pitting. The cavitation intensity map in the engine speed-load domain as proposed by Hosny et al (1996) is a good way to convey the boundary limit curve for the region of cavitation in the engine operating domain. Green and Engelstad (1993) simulated coolant pressure wave propagations and attempted to predict the bubble formation location and the cavitation location.…”

“…They pointed out that cavitation erosion is different from corrosion since the metal is removed as much larger particles in cavitation than in the case of corrosion. Liner cavitation mechanisms in diesel engines were also explained by Hosny et al (1996) with a six-step process: (1) engine loads;…”

Investigation of coolant flow distribution and the effects of cavitation on water pump performance in an automotive cooling system

“…However, the cavitation phenomenon prevents a precise measurement of the flow rate, especially during the warm-up period in which the coolant temperature typically remains below 801C. This issue has been pointed out in some studies addressing the measurement and analysis of cavitation [7][8][9][10][11][12], but the lack of good experimental data has limited the development of a water pump that can operate at the optimum efficiency. Therefore, the objective of this study is to better understand the cavitation phenomenon that occurs in cooling systems by measuring the flow rate for various temperatures and compositions of the coolant.…”