SISCIENGINES By: shivam qupta

About Me. . I am Shivam Gupta .Engineering in MECHANICAL STREAM Cleared 3 times GATE exam, UPSC CAPF AC, UPSC CDS,AFCAT and Engineering services written exam Love teaching , music and travelling. RATE,REVIEW, RECOMMEND AND SHARE . Follow me at :https://unacademy.com/user/Shivamgupta01

Otto Cycle : (Constant volume cycle) V- constant 3 iabat 4 tic V constant 'Swept volume Clearance volume

Otto cycle processes: P 1-2 Reversible Adiabatic or isentropic compression P 2-3 Constant volume heat addition P 3-4 Reversible Adiabatic or isentropic compression P:4-1 : constant volume heat rejection Adi 'Swept volume Clearance volume

Air standard efficiency of Otto cycle : Qr output 2Wnet Qs-0r input Now we know that Qs mCv(T3-T2)

m C v (T3 T2) 1- (T4-T1) (T3 T2) 7 T4 T1 4 T3 V constant T 2 For Adiabatic process 1-2 vY-1 constant

1-1 T1 V2 Ad and from adiabatic process 3-4 T3 V4 Clearance Swept volume volume Thus from above equations T2 T3 con T1 T4 4 T4 T3 V consta T1 T2

T1 ( T4- T1 T3 T2 (- 73) T2 T1 T2 T1 T2 ; Efficiency of Otto cycle - , -1

_1 Air standard efficiency of Otto Cycle .As compression ratio increases the efficiency of the Otto cycle increases. Limit of compression ratio is subjected to knocking phenomenon in SI engine. If compression ration become 1 then efficiency will be 0 "zero". .

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Shivam Gupta

YouTuber : 3 times GATE qualified🏆 : ESE written qualified : PSU's qualified : Mechanical lover 🏅: musician : model : all Rounder 🥇

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Prince Yadav

6 months ago

sir 2nd 3rd questions me doubt h concept method se solution btaiye plzzz

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Mamata

6 months ago

I have the same doubt

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Vipin Saroj

2 months ago

sir ham jo t3_t2 tha use t2_t3 nahi ho sakata

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Deepak Chandra

a year ago

volume increases Kar ke bole ,sir.

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