Experimental and Numerical Study of Swirling ... - Solid Mechanics

More documents

Recommendations

Info

Experi imental and Numerical N Stud dy of Swirling g Flow in Scaveenging Processs for 2-Stroke Marin ne Diesel Engin nes Figur re 4.47: Pressure e Taps Location on Scav venging Flow Test t model. 4.4 Cylinder r Wall Prressure MMeasureme ents For eac ch measuring g position annd at a giveen Reynolds number, stattic differen ntial pressure is i measured beetween a poinnt close to the swirl generator inlet (radial distance e of 1 cm froom inlet ) as the referencee point and thhe cylinder wall at that given g positionn (Figure 3.2). Where P in is the pr ressure at thee inlet and P z is the presssure at a giveen measuring position as mentioned iin (Table 4.1). The pre essure taps are e mounted at single point oon the circummference of eacch measuring cross sec ctional planee (Figure 4.447). The meaasured pressuure differen nce at differen nt positions tthus providess pressure droop downstreaam along th he cylinder len ngth with resppect to test moodel inlet. The me easurements are a conducted using a high resolution Fuurness digital differential micro m manommeter. For eaach position measure ed for a time period of 3-5 min with dataa acquisition f The me easured differe ential pressuree will represennt an average v case of three dimensional swirlingg flows especiaally flow with helical behavior of th he vortex, the pressure at thhe wall change followin ng the vortex behavior insidde the cylinderr and a measu of 1s may m not resolve e the high freqquency fluctuaation of wall s high Re e. ® FC05110 the pressure is frequency of 11s. value because in h asymmetric oor es with time i. .e. urement intervval tatic pressure at Pressure Tap P P P inn z Chapter 4 (4. 1) 98 Swirling Flow in a Pipe
Experi imental and Numerical N Stud dy of Swirling g Flow in Scaveenging Processs for 2-Stroke Marin ne Diesel Engin nes Figure 4.48: Avera age Static Pressur Drop p along the Cylin @ Re e = 1.2 x 10 5 re der . Fig gure 4.49: Average Static Pressu Drop p along the Cylin @ Re R = 0.6 x 10 5 ure nder . Chapter 4 Figures 4.48 and 4.49 9 show the noormalized presssure drop aloong the cylindder for diffe ferent cylinder r lengths at ReeA and ReB resspectively. It ccan be seen thhat for bot th Reynolds numbers n the pressure dropp along the ccylinder decaays rapidly for the first 4 positions. The pre essure drop at position z1 is rrelatively highh compared to o other positionns and at the t next positi ion z2 the presssure drop redduces significaantly. A possibble reason is the shape of o inlet to thee cylinder whhere the flow from the swiirl generat tor (Inlet Sect tion) gets a shharp bendingg and creates a near cylindder wall re-circulating zone (Figure 3.44). For cyl linder length L3 at positioon z6, the prressure drop rreduces furthher indicati ing the effects of cylinder ouutlet wall, as tthis position foor L3 is closer to 99 Swirling Flow in a Pipe
Page 1:
Experimental and Numerical Study of
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Experi imental and Numerical N Stud
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68: Experi imental and Numerical N Stud
Page 69 and 70: Experimental and Numerical Study of
Page 117: Experi imental and Numerical N Stud
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Manuscript J Mar Sci Technol manus
Page 247 and 248:
00000000 11111111 piston screen con
Page 249 and 250:
50 % and 75 % partially closed inta
Page 251 and 252:
V θ / V b V θ / V b V θ / V b 1.
Page 253 and 254:
V θ / V b V θ / V b V θ / V b 1.
Page 256:
DTU Mechanical Engineering Section
show all

Experimental and Numerical Study of Swirling ... - Solid Mechanics

Create successful ePaper yourself

Delete template?

Save as template?