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Solution to Previous Year Exam Questions for IC Engines and Gas Turbines - ICEG of KIIT by Satya Prakash Kar

  • IC Engines and Gas Turbines - ICEG
  • 2010
  • PYQ Solution
  • Kalinga Institute of Industrial Technology - KIIT
  • Mechanical Engineering
  • B.Tech
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JB a c & & t R Ė IC E & G 1 1 lylE $ 0 6 (M E ) , ı S E M E S T E R E X A M IN A T I O N F IF T H Ż0 0 9 « : N ES & G A S ON ENG ı ŃT E R N A L C O M B U S T ı ı N ES T ÜR B ı / [M E F u ll M A a rk s : 70 e s tio n s T h e tig u Ca n d id a te s p r a c tic a b le a n res a r e r e q u ir e in c lu d in g q u e s tio n N o J w h ic h is in th e m a r g iJı indicatell m a r d to g iv e th e ir in th e ir a n s w e rs © r m Æm m q us t i o n b d T im .. y S IX q u n M ver a n ] 506 e e : com 3 H p u ls o r y o w n w o rds a s f*ır a t rıJ ï r 4 rn m a n s w e o u rs 团 . 团 ■ as Q 回 n , A 1 a ) ss u m e su c e r ta in e n A m e c n ic a ha de ı iv e d re b ) T h e bo e c ) ffic ie e d ) D ę fin d s tr o 10 k w po w n ke fa o m Y a ir s w n e n m a 7 / ' e y g in a p re e c o m s s io n ra T ls th e te te m ex pa pe g O tto o n tiv e ı e a y T he c ı ı a te th e a ir s ta c u ı c s w fo m s s io n ra tu r ė o n s io n 10 c e yc ı ra n c e n d a rd ith tu rb u ı a n c e In ' W h a t is its tio r m a x im u m d itio p re × ' i co n c o m e w o rk in i ne . n P Z , ir ľ in C ıE n g in e (ii)th e 6 ł! F $ S h o w th a t fo r a s im ı e id e 2 g pe C (i)th e S ıE n g in e ¢ in d ić a te d p o w e r ı ts F in d th e b ra k e p o w e r e r re s is 0 0 0 1 0 2 5 ' s iecess here v e r y is 8 0 % n c d 30c ncy n g p ro d u c e d fric tio a n COmpre . . S a n re a n vo ı u m e e s w l e ffic ie 17 c m a re g in ita b ı e d a la pe ra in a f th e a C lga s ra n g e fo r :\ M ' . L he p e c ific o u tp u t is T 2 - T 4 w h ė n t u r e o f a ir a fte r is e n t r o p ic s c o m e x ha p re us s s o r t ga se s a n a d T fte r is th e 4 is e n tr o p ic in th e tu rb in e ł (l) / K ITT U /2 0 0 9 /A u tu m n E n d Se m e s te r Exa m ł n a t to n 20 0 9 / Scanned by CamScanner

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T hė in im m um tu rb in e p la n t w d 8 1 7 °C d a n a x im u m m te m p e rk in g in B ra y to n o r a tu re o (Id e a l)c y c le f a ga re s T h e fo ı ı o w irig 2 g °c a re p e c tiv e ı y T h e c y c le u s e s a p re ra tio o f 5 W h a t is th e w o rk ra tio o f th e ı p a n t? a n s a ir s ta n d a rd W h a t is th e p re W r ite a n e n g in W n a td o H y tw e a n e ffic ie s s u re ra d iffe o n c d C I e n y tio e re n c e s g in o fa m ėra y to n o y e d in th e pı b e tw e e n kn o c c D A n g in e e n 0 5m a , b e g in p re n in g w o rk in e ? yc ı O Te g ) . k jn g in S I 1 ba s s u re o f th e r a n d te c ı e m pe ha ra tu s re a v o lu m e 27 c ° a o p re s s io n s tro f r a tu r e o A tm o s p h e ric te Percentage y c le a n w o r k in g d c t th e s (fo , o re he , , us t p e r a tu re 360 k m p tio n ffe c tiv ė p re s s u re re x ha us 30c m - , tg a se s S tro k e ) l = 2 45 - 3 ' te a C x c ha b u s tio o m H E W h y is fla m e s p e e d im p o r ta n t? D is c u s s th e e ffe c t o f d iffe r e n t E n g in e v a ń a b le s o n fla m e p ro a a tio n d u r in p g g c b śti i S f a i co m u o n n /4 . e n g in e s j ? , ço / p & n ge r ı s e n tro p ic efficiency o f c o r ls e n tro p ic e ffic ie n c y o f T u r M e c h a n ic a ltra n s m is s io n e f fic ie n c y n e t w o rk d o n e , pe r Ħe c tiv e p re s s u re ı f th e n u m b e r o f is 2 0 0 p e r s e c o n d fin d th e pow e r , 3 f ı lowing d a ta s a p p ly T he m e a n e y c le fe x h a co n su m e a n e l f c o o li p e ra tu re o pe , 1 - 7 ra k e p o w e r (a (b ) M e c h a n ic a lE ffic ie n c y (c ) In d ic a te d U ıe rm a ıe ffic i a (d ) D ra w u p th e h e a t b a ı , c ra tu r e o pe m )B , c le a F a n c e m e te r T a k e th e fo ı lo w in g C V o f fu e l = 4 5 0 0 0 K J /k s k e A t th e e n d o f th e p k e th e p re s s u re is 1 0 b a r e in d 2 1 0 K J o f h e a t is a d d e d d u ń n u m e h e a tin g g c o n s ta n t v o ı p ro c e s s C a lc u la te th e p re s s u r e s Te m e a tu re a n d p v o lu m e s a t s a lie n t p o in ts in th e c l A ls o fin d th e c e y co m 12 0 0 0 - w a te r c irc u m A ir r e s s io n s tro co m d ia m ı in g o m tle t te u M O «W k e d ru ra In le t te e s o n vo ı u tio n T o ta l c o B g u ra B C 2 e c y lin d e r o ile gı tio n o f tra il・ 1 h o u r T o ta l r e ・ y o u m e a n b y ig n iü o n d e ı a y p e rio d in C ıE n g in e ? it is d iĦe re n t fro m ig n itio n ı a ģ in S I e n g in e ? ow ti , , is 4 5 % c y c le rv a o n a s in s s u re g ) A d ie s e le n g in e h a s a b ra k ė th e rm a ı e ffic ie n c y o f 2 3 % ı f th e c a lo rific v a ı u e o fth e fu e lis 4 2 00 0 k J /k g th e n w h a t is th e b s f c ? o 3 UÅ T he bs e o P ų a k ・ e ffe c n e tiv e n e re s s u r e r a M a x im co n d itio Lo w e r tio c u m ns Ħic ie n c y - - ss - O 0 8 . 4 0 y c le te m + ė 1 ba r a n d 2 8 h e a tin g O f fu v a lu e (2) m u a o o t : 4 ıı» n n E n a Senı er Æ esı rm Jn a ¢lo n 1 0 0 9 l MK IIı TT U /2:0L 0 9 /A u tu . . E . d Se m eln Eį a in iin i ito Scanned by CamScanner n

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4 fo ı lo w ińg ın e bse o tio rv a ta k e n s w e re d u r in g n tra iı a in d e r O iıe n g in e e c yı gı s u m p tio n = 7 6 K g D u r a tio n o f tra iı= 1 h o u fu e ıc o rı = 1 5 KN T o ta ıre v o ı u tio n = 1 2 0 0 0 N e t b ra kė lo a d o n a s in k e d ru ra T o ta ıc o In ı e t te O Te A tm fe r a tu re o p h e r ic te n s u m p tio co m n C V (fo C p f fu o re re x e y 09 & a te r , ìińiw ha u s tga s e s x 5 5 0 kg = p e ra tu r e = 3 6 0 kg s s u re , 1 5 °C = a te r 60 C = 3 0 0 °C = 20 C , ° , , ° = , , = 6 ba r ı= 4 5 ó 0 0 K J lk g , ha 3 0c = d fc ffe điv e p re ı th e fo ı o w in g o , re ? e a n e T a ke B p e ra tu m 1 83m = fco re o o s A ir M p e ra tu m pe m m e te r w a te r c irc u la te ı in g o tı e t te u d ia m ° , , B , u s m tga S tr o k e , ) 1 K J /k g k se s = 4 5c m = , D , e , te rm in e ŁJ 7 1 L a (a ) B r a k e p o w e r (b ) M e c h a n ic a lE ffic ie n c y 0 / n d ic a te d th e rm a ı e ffic ie n c y o (c ) ı a n ce o n (d ) D ra w u p th e h e a t b a ı ° . B R ba n pe s is rc e n ta 33 ge ba ・ q f. V /ł ・r s is 3o z y & . . Cw w T h e fo ı ı o w in g d a ta he a te x c ha n g e r ı se n tr o ı se n tro M e c C o m H E ha p ic p ic n ffic ie n e ffe c tiv e ne s s p re s s u re ra tio M a x im u m c co n Lo d itio w e r K M T U /2 0 0 9/A u tu m n n s = n c - y o fco a ga s tu rb in e se tu s ı n g ļ 3/ . a p re s s o r = 0 8 3 e ffic ie n c y o f T u rb in e = 9 8 5 ic a ıtra n s m is s io n e ffic ie n c y = 0 9 9 e b u s tio e ffic ie ppı y to s a g z lh m y = 0 98 0 8 n c = o e te m p e ra tu yc ı 1 ba r a n d 2 88K h e a tin g u e o va ı E n d Se Ex m e s te r a m f fu ln a e re = 11o o K , Ambient ı= 4 3 4o o K J lk g llc Scanned by CamScanner

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n ý T a ke C a = 1 0 0 5 K J lk g k y = l 4 d u r in g c o m p re s s io n 1 4 7 K J /k g Ķ Y = 1 3 d u rin g c o m b u s tio n a n d , p ņ9131 . ansion C a !ė u i e) i ' à t , '. COńsųption a n d S ho th e p r o w w o rk o șpecifi c y c le e ce ss on P " u tp u ty , Òz M Y t łlir J ?+ ? ' ・ t , ¢: fu e l pe c i ı o se s g le c t a lı s \ ie n c y N e ć& f D ia g r a m , h l ș . t 6 a ) W h a t is th e fu n c tio n o f c a rb u re «o r iri a n B r ie Ħy e x p la in w ith a n e a t s ı æ tc h th e » Į s im p ı e n o a t ţ y p e c ar bu re tto b ) D is c u 7 ss d iffe re n b r ie fı y a bo u A fo ke u r s tr o t ty p e t its a fo , dv o ge s a n in u r cyı de r d ie d d is a d v s e ıe n 5 【 ? n g in e p q ra tio n o fa W rite ' n s , a n ta S, ıE L f \ tro ı in je c ü o s o . a y s tie m n ta g e g in e [5 s ru n n in g a t 2 0 0 0 rp m d e v e lo p s 5 0 K W B r a k e th e rm a l e ffic iė n c y is 2 0 % a n d c a ı c o rific v a ı u e o f fu e l i [C V ) is 4 2 M J lk g . , E n g in e h a s a b o re o f 1 2 0 m m a in d s tr o k e o f 9 0 m m T a k e p a = 1 1 5 k g im a a ir ftie l r a tio = 1 5 : 1 a n d ls x M e c h a n ic a l e tftc ie n c y = 0 8 Ċ a lc u la te (i) f u e ı ç " ° 0 7 7 11 c o n s u m p tio n (k g ls ) (ii) a lr c o n s u m p ti? h (mĵ jś , ・ (iii) 2 5 I/ ・ e in d ic ffic ie (v i) M n c y e a n te d th e a (v ) B p is to ra n s rm a ke M pe l ' Ħic ie q c y (iv ) v o lu m n e ffe c tiv e p re s s u re e e a 7 d e ・ e tr ic a n lili irv y l* h ı d $ &z ł milı W ń te i) h o rt n o te ) [2 5 × 4 O pe s o ra tio o n tr o fc o b u s tio m n o f tw m o n Í ėn g in S . f in je c tio o s tr o - ke e n lo f k n o c k in g irï S I . / I U /2 0 0 9/A u , Te s t o rs e S ta g e C Cm (a n y fo u ir) . J e rk p u m p s y s te v s Diinjection T y p e C o m b u s tio n c h a rn b e r o fC I e n g in e ii) M iin s . e n g in e n !n es g irie X X X X X tu m n En d Sem e s te r Ex am ïn io n a ł 20 09 Scanned by CamScanner

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