. Applied thermodynamics for engineers. onstant (Art. 454).This has been discussed by Eddy (17), Frith(18), and Reeve (19). The illustrative dia-gram, constructed as in Art. 347, is sugges-tive. Figure 133 shows such a diagram foran engine tested by Denton (20). Theinitially hot cylinder causes a rapid ab-sorption of heat from the walls during theearly part of compression along ah. Later,along he, heat is transferred in the oppositedirection. Combustion occurs along cd, thetemperature and quantity of heat increas-ing rapidly. During expansion, along de,the temperature falls with increasingrapi
. Applied thermodynamics for engineers. onstant (Art. 454).This has been discussed by Eddy (17), Frith(18), and Reeve (19). The illustrative dia-gram, constructed as in Art. 347, is sugges-tive. Figure 133 shows such a diagram foran engine tested by Denton (20). Theinitially hot cylinder causes a rapid ab-sorption of heat from the walls during theearly part of compression along ah. Later,along he, heat is transferred in the oppositedirection. Combustion occurs along cd, thetemperature and quantity of heat increas-ing rapidly. During expansion, along de,the temperature falls with increasingrapidity, the path becoming practicallyadiabatic during release, along ef. The TV diagram of Fig. 133 indicates that nofurther rise of temperature would accompany increased compression; the actualpath at y has already become practically isothermal. 308. Comparison of Cycles. Figure 134 shows all of the cycles thathave been discussed, on a single pair of diagrams. The lettering cor-responds v^rith that in Figs. 122-128, 130. The cycles are,. VOR N Fig. 133. Art. 307.—Diesel EngineDiagrams. 188 APPLIED THERMODYNAMICS Carnot, abed, Lenoir, dfogX,dpo, Diesel, dabf, Otto, ebfd, Braj^ton, dnbgh, dnbi, Atkinson, ebcd, Complete pressure, debgh, debt
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