Question
Download Solution PDFAll diesel engines except slow speed engines use which cycles?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFWhether heat is added at constant pressure or constant volume in actual applications, depends upon the rate of heat added and the rate at which pressure decreases due to movement of the piston.
In an ideal cycle, the piston is assumed stationary during heat addition at constant volume, but in practice this does not happen. As the speed of the engine increases, the rate of decrease of pressure due to movement of the piston increases, and heat addition cannot be assumed at either constant volume or constant pressure.
In such a case, a better approach for modelling the situation will be to assume heat addition initially at constant volume and then at constant pressure. That is why dual combustion cycle is used.
- All diesel engines except slow speed engines use mixed dual cycles.
- This is because in mixed dual cycles the heat input occurs partially at constant volume and partially at constant pressure.
Last updated on Jul 1, 2025
-> SSC JE ME Notification 2025 has been released on June 30.
-> The SSC JE Mechanical engineering application form are activated from June 30 to July 21.
-> SSC JE 2025 CBT 1 exam for Mechanical Engineering will be conducted from October 2 to 31.
-> SSC JE exam to recruit Junior Engineers in different disciplines under various departments of the Central Government.
-> The selection process of the candidates for the SSC Junior Engineer post consists of Paper I, Paper II, Document Verification, and Medical Examination.
-> Candidates who will get selected will get a salary range between Rs. 35,400/- to Rs. 1,12,400/-.
-> Candidates must refer to the SSC JE Previous Year Papers and SSC JE Civil Mock Test, SSC JE Electrical Mock Test, and SSC JE Mechanical Mock Test to understand the type of questions coming in the examination.