Cavitation Intensity Measurements for Internal Combustion Engines 960884
Recent engine design trends towards increasing power, reducing weight, advancing of injection timing and increasing of injection rate and pressure could result in increased incidence of liner pitting. Liner pitting due to coolant cavitation is a complex function of many engine design parameters and operating conditions as described in reference [1]*.
Traditionally, liner cavitation problems were not detected early in the development cycle. Traditional liner vibration and coolant pressure measurements in conjunction with a numerous amount of expensive engine endurance tests were then needed to resolve cavitation problems.
A method newly developed by the author and described in reference [2] for cavitation intensity measurements was successfully utilized to map out engine operating condition and develop limit curves. This method could also be applied in a non intrusive fashion. The method accounts for both macroscopic and microscopic aspects of the cavitation process in the coolant jacket adjacent to the liner. The macroscopic effects include liner vibrations and coolant pressure drop for cavitation inception. The microscopic effects include bubble dynamic aspects that finally result in formation of intense microjets that cause the damage.
Understanding of engine operating condition, coolant type, pressure, temperature and flow rate in cavitation severity have been developed utilizing this method. The method can replace expensive and time consuming endurance testing. The method helped to accelerate the fundamental understanding of the complex nature of coolant cavitation in internal combustion engines.
Citation: Hosny, D., Tibbetts, D., and Luenz, R., "Cavitation Intensity Measurements for Internal Combustion Engines," SAE Technical Paper 960884, 1996, https://doi.org/10.4271/960884. Download Citation
Author(s):
Diaa M. Hosny, Dennis Tibbetts, Roger Luenz
Affiliated:
Cummins Engine Co., Inc.
Pages: 19
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Engine Coolants and Cooling System Components-SP-1162, SAE 1996 Transactions - Journal of Engines-V105-3
Related Topics:
Coolants
Combustion and combustion processes
Pressure
Corrosion
Vibration
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