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The air standard otto cycle comprises:

<p><strong>A two constant pressure processes and two constant volume processes   B two constant pressure and two constant entropy processes   C two constant volume processes and two constant entropy processes   D none of the above</strong></p>

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تم إضافة السؤال من قبل Alex Al Yazouri , General Manager , Al Mushref Cooperative Society
تاريخ النشر: 2014/12/25
Basit Ali
من قبل Basit Ali , Director of Engineering , Laverda Suites & Villas / Blue Bay Resorts

Option A

2 constant pressure processes and two constant volume processes 

مستخدم محذوف‎
من قبل مستخدم محذوف‎

Thanks for invitation

Out of my knowledge 

Elke Woofter
من قبل Elke Woofter , Project Assistant , American Technical Associates

The air-standard-Otto cycle is the idealized cycle for the spark-ignition internal combustion ...

This below would let me believe D to be the right answer.

As this an isotropic process, entropy remains constant (i.e., s1=s2). 

The Otto Cycle is more commonly known as the4 stroke cycle and is comprised of four functions which take place in a sequential order within the cylinder: Intake, Compression, Combustion, Exhaust. Or for us simple people it's Suck, squeeze, bang, blow. Pressure never remains constant nor does volume.

Process1-2: Reversible adiabatic compression of air.

Process2-3: Heat addition at constant volume.

Process3-4: Reversible adiabatic expansion of air.

Process4-1: Heat rejection at constant volume

 

Kaushik Patel
من قبل Kaushik Patel

Two constant volume and two constant entropy process

Alex Al Yazouri
من قبل Alex Al Yazouri , General Manager , Al Mushref Cooperative Society

Good analysis to the answers by Elke.

Pressure never remains constant nor does volume.

D none of the above

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