What causes thermal surging in a marine engine turbocharger?
Direct Answer
Option D: Breakdown of smooth airflow through compressor due to sudden engine load changes or fouled grid
Surging occurs when airflow through the turbocharger compressor stalls due to downstream flow restrictions, such as fouled air coolers or exhaust gas boiler deposits, combined with sudden engine load reductions. This creates severe pressure pulsations, loud rumbling noises, and potential mechanical damage.
All Options
Detailed Explanation & Context
Surging occurs when airflow through the turbocharger compressor stalls due to downstream flow restrictions, such as fouled air coolers or exhaust gas boiler deposits, combined with sudden engine load reductions. This creates severe pressure pulsations, loud rumbling noises, and potential mechanical damage.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).
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