Indicator Diagram Of Engine. An indicator diagram is a chart used to measure the thermal or cylinder performance of reciprocating steam and internal combustion engines and compressors. Indicator diagrams are taken at regular intervals of time and matched with that of the ship s sea trial diagrams to check if there is any significant difference in performance.
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We can see there is no pressure in the engine cylinder so clearance is zero but practically it is impossible shown in the line diagram. As mentioned before the indicator diagram of a modern high speed diesel engine closely resembles an otto cycle. Indicator diagrams are used to assess the performance of each unit of the ship s main engine.
Theoritical or hypothetical indicator diagram of steam engine theoretical indicator diagram or hypothetical indicator diagram is defined by the modified rankin cycle define by pressure volume curve.
318 and is referred to as the diesel cycle. Pm a l x k bar work done in one cycle mean indicated pressure x area of the piston x length of stroke pm x a x l. Average height of the diagram a mm 2 l mm average mean indicator pressure a mm 2 l mm x k bar mm. Area of the indicator diagram a mm 2 length of the diagram l mm.
