Question

(c) Calculate the angular velocity of the gas mixture using paddle wheel model of the cylinder engine by assuming swirl ratio is 11 Use the following data: i air to fuel ratio=88 ii. compression ratio 7.2 iii. volunetric efficiency=77 iv. indicated thermal efficiency 33 v. mechanical efficiency 55 vi. brake power 62000 j/sec vii. engine volue 1000 cm3 viii. calorifie value 45000 kj/m

This question is about the material of internal combustion engines. The answer needs 15 minutes

Answer 1

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Data given 2 11 no. of Cylinden Sold Ratio normt 11 9. 2 Compression ratio die Muel 077 3.3% - 0-33 nith Kimeen = 0.55 P = 62 KW 1000 em 3 Vs CV - 45000 /m® mech = BP IP IP 62% 103 0.55 = 112.72 KW 80 nith IP Vr 112.72 VA XOV 0.33 X 45000 V = 752x103 mois ria va mit NA va = f x 8.8 va = 8.8 x 708 2410

= 0.066 m3 ls Mual va vs (5 x 82]*2 IX LX N X is = US X LXN * K GO Muoi Ya Vsy N/BOXK box 0.066 kioo x 0.7742 NE 2_ố 11 Số 16 0 from, soin Radio ws ZAN Ws = 2ANX swiH Ratio Wg = 24 Ay 2571-43 X 11 Ws = 177724-38 1941 Bec Ws : 2962 - 07 and I min