Effects of Fuel Flow and Airflow Swirl on Thermal Performance of a Miniature-Scale Combustor for Direct Energy Conversion Systems

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Swirler</td><td class="align_center" colspan="3">Emitter efficiency enhancement (%)</td></tr><tr class="thead"><td class="align_center"><span style="width: 100.308ptpx;"><svg height="16.7889pt" id="M43" style="vertical-align:-5.2823pt" version="1.1" viewbox="-0.0498162 -11.5066 100.308 16.7889" width="100.308pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,7.536,-2.975)"><path d="M-161 571C-161 600 -183 623 -212 623C-238 623 -262 600 -262 571C-262 544 -238 520 -212 520C-183 520 -161 544 -161 571Z"></path></g><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M749 358C749 544 611 667 432 667C180 667 21 482 21 287C21 118 131 1 297 -15L310 -24C447 -124 532 -151 560 -158S670 -172 720 -160L727 -135C647 -102 630 -94 477 -5L465 2C649 55 749 196 749 358ZM592 362C592 218 513 70 428 36L398 54L298 31C218 57 178 165 178 282C178 436 280 622 417 622C541 622 592 521 592 362Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,9.539,3.132)"><path d="M625 186C574 85 512 32 429 32C293 32 194 153 194 337C194 485 274 621 419 621C496 621 573 586 606 468L643 475C636 537 629 583 620 638C593 644 519 665 438 665C199 665 42 523 42 317C42 158 152 -15 418 -15C486 -15 578 5 604 11C621 46 647 122 660 171L625 186Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,15.713,3.132)"><path d="M746 650H445V615C520 608 528 602 528 517V370H255V517C255 602 263 608 335 615V650H35V615C112 608 121 602 121 517V133C121 48 112 42 39 35V0H337V35C263 42 255 48 255 133V319H528V133C528 48 520 42 441 35V0H746V35C670 42 662 48 662 132V517C662 602 668 608 746 615V650Z"></path></g><g transform="matrix(.0065,0,0,-0.0065,22.865,5.233)"><path d="M496 176V231H406V629H337C242 511 133 363 25 211V176H279V113C279 53 274 40 189 33V0H487V33C413 40 406 49 406 109V176H496ZM279 231H103C166 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42 418V389C89 382 93 373 93 315V105C93 42 88 39 30 32V0H265V32C227 38 220 43 220 100V344C248 366 273 376 297 376C334 376 366 354 366 282V100C366 41 362 38 315 32V0H546V32C501 38 494 43 494 100V302C494 317 493 331 492 342C524 369 549 376 569 376C601 376 639 359 639 277V105C639 42 632 38 588 32V0H823Z"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">F30O0</td><td class="align_center">18</td><td class="align_center">9</td><td class="align_center">13</td></tr><tr><td class="align_left">F45O0</td><td class="align_center">38</td><td class="align_center">18</td><td class="align_center">37</td></tr><tr><td class="align_left">F0O30</td><td class="align_center">353</td><td class="align_center">126</td><td class="align_center">43</td></tr><tr><td class="align_left">F0O45</td><td class="align_center">412</td><td class="align_center">173</td><td class="align_center">57</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Enhancement of emitter efficiency when compared with nonswirling flames (F0O0) at three fuel flow rates.</div>

International Journal of Energy Research

tab3

Table 3

Table 3: Effects of Fuel Flow and Airflow Swirl on Thermal Performance of a Miniature-Scale Combustor for Direct Energy Conversion Systems 