Upgrade to remove ads
Terms in this set (10)
For an ideal diesel cycle, as the cutoff level decreases, its efficiency ___.
List the four stages of the diesel cycle in order: isentropic expansion, isentropic compression, constant-volume heat rejection, constant-pressure heat addition.
1-2: isentropic compression
2-3: constant-pressure heat addition
3-4: isentropic expansion
4-1: constant-volume heat rejection
Modern diesel engines, where the fuel begins to ignite during the compression stroke, are best modeled using the ____ cycle, which combines elements of the otto and diesel cycles
T/F: The heat-addition process is constant-pressure in the Brayton cycle, but constant-volume in the diesel cycle
False, the heat-addition process is constant-pressure for both the ideal Brayton and Diesel cycles
T/F: The compression is assumed to be isentropic in the Brayton cycle, but not the ideal Diesel cycle
T/F: The heat rejection for the Brayton cycle occurs at constant pressure, whereas the heat rejection from the diesel cycle occurs at constant volume
T/F: The Brayton cycle is executed in a closed loop of steady flow devices, while the diesel cycle occurs in a reciprocating piston cylinder device.
What is the ratio of pressures after and before the compressor in a Brayton cycle engine called?
The ___ ___ ratio is the ratio of work consumed by the compressor to the total work produced by the turbine
How are improved materials for turbine blade construction related to an increase in the Brayton cycle efficiency?
New materials maintain increased temperatures
Other sets by this creator
Earth 122 Midterm 2
Other Quizlet sets
Exam ONE MC
Physical Science 3rd Quarter Exam