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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A study on detonation in starting air manifold of diesel engine
Two accidents of explosion in starting air manifold in two ships were experienced in recent years. The accidents caused the loss of maneuverability of the ships. One of the two accidents sparked serious public fear for marine safety after it left a VLCC tanker full up with crude oil drifted in the Tokyo bay. In this paper, the authors describe the causes of such kind of explosions and corresponding revisions of classification rules as safety measures against such accidents, after a thorough examination of several similar accidents occurred over the last two decades. Summarising the results of foregoing analysis, it can be concluded that: (1) Auto-ignition in starting air manifold of diesel engines can he caused by rapid opening of starting air stop valve, which has been neglected so far because of lack of the knowledge of such phenomenon. (2) Elimination of the compressor lubricant and system lubricant from the air manifold will efficiently reduce the risk of compression ignition. (3) To reduce the pressure rise rate by appropriate choice of starting air stop valve opening time and its maximum area could effectively reduces the final gas temperature. (4) For a given maximum pressure rise rate, reduction of diameter of manifold would lead to a lower final gas temperature. (5) Rupture disc with a sufficient area attached at air manifold may effectively limit the pressure rise to a level almost equal to the designed static bursting pressure. (6) Film detonation and mechanism of carryover of combustibles into air manifold should be further examined in the future.
A study on detonation in starting air manifold of diesel engine
Two accidents of explosion in starting air manifold in two ships were experienced in recent years. The accidents caused the loss of maneuverability of the ships. One of the two accidents sparked serious public fear for marine safety after it left a VLCC tanker full up with crude oil drifted in the Tokyo bay. In this paper, the authors describe the causes of such kind of explosions and corresponding revisions of classification rules as safety measures against such accidents, after a thorough examination of several similar accidents occurred over the last two decades. Summarising the results of foregoing analysis, it can be concluded that: (1) Auto-ignition in starting air manifold of diesel engines can he caused by rapid opening of starting air stop valve, which has been neglected so far because of lack of the knowledge of such phenomenon. (2) Elimination of the compressor lubricant and system lubricant from the air manifold will efficiently reduce the risk of compression ignition. (3) To reduce the pressure rise rate by appropriate choice of starting air stop valve opening time and its maximum area could effectively reduces the final gas temperature. (4) For a given maximum pressure rise rate, reduction of diameter of manifold would lead to a lower final gas temperature. (5) Rupture disc with a sufficient area attached at air manifold may effectively limit the pressure rise to a level almost equal to the designed static bursting pressure. (6) Film detonation and mechanism of carryover of combustibles into air manifold should be further examined in the future.
A study on detonation in starting air manifold of diesel engine
Song, Y. (Autor:in) / Shihara, H. (Autor:in) / Sasaki, S. (Autor:in)
2000
6 Seiten, 10 Bilder, 11 Quellen
Aufsatz (Konferenz)
Englisch
Diesel engine quick starting auxiliary electronic controller
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