Abstract
Engine troubles at sea have serious impacts on ship navigation. Serious engine troubles such as damaged piston rings and abnormally worn cylinder liners have even been imputed to problems with marine fuel.This paper proposes a method to test single droplets of marine fuel in order to prevent fuel-related troubles. In this test, a droplet of constant volume suspended from the tip of a quartz stick is combusted in high-temperature air. The marine fuel oil is evaluated based on the length of the burning time and amount of soot. A device to quantify the marine fuel oil and a flame detector were designed to simplify measurement.The standard for the evaluation is shown as follows:1) Marine fuels that have caused engine problems burn longer than marine fuel oils that have not caused problems.2) When marine fuels that have caused engine problems are combusted, large quantities of soot adhere to the quartz stick.Our results indicate that this method can be effectively used to identify marine fuels that cause engine problems.
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