Optimisation Analysis of Structural Parameters of an Annular Slot Ejector Based on the Coanda Effect

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Structural parameter</td><td class="align_center">Origin size (mm)</td><td class="align_center">Optimised size (mm)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left"><i>D</i><sub>main</sub></td><td class="align_center">25</td><td class="align_center">25</td></tr><tr><td class="align_left"><i>D</i><sub>sec</sub></td><td class="align_center">80</td><td class="align_center">160</td></tr><tr><td class="align_left"><i>D</i><sub>out</sub></td><td class="align_center">145</td><td class="align_center">290</td></tr><tr><td class="align_left"><i>d</i></td><td class="align_center">80</td><td class="align_center">160</td></tr><tr><td class="align_left"><i>e</i></td><td class="align_center">0.3</td><td class="align_center">0.1</td></tr><tr><td class="align_left"><i>θ</i></td><td class="align_center">6°</td><td class="align_center">6°</td></tr><tr><td class="align_left"><span style="width: 15.8348ptpx;"><svg height="11.8174pt" id="M30" style="vertical-align:-3.1815pt" version="1.1" viewbox="-0.0498162 -8.6359 15.8348 11.8174" width="15.8348pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M828 650H570L564 622C646 614 650 609 634 524L604 366H253L281 524C296 608 308 615 382 622L388 650H132L126 622C211 615 214 609 198 524L121 122C106 42 102 35 23 28L17 0H276L282 28C196 35 191 40 206 122L243 324H597L559 123C544 42 537 35 452 28L446 0H710L716 28C632 35 628 43 643 122L719 524C735 610 741 615 822 622L828 650Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,10.075,3.132)"><path d="M567 167L534 181C505 122 482 94 454 70C428 46 385 42 330 42C288 42 248 44 235 55C216 70 213 91 220 130L295 528C310 609 314 611 401 618L409 650H140L131 618C222 611 224 609 209 528L133 126C118 47 108 41 25 33L18 0H497C514 33 554 126 567 167Z"></path></g></svg></span></td><td class="align_center">20</td><td class="align_center">40</td></tr><tr><td class="align_left"><span style="width: 14.9866ptpx;"><svg height="11.8174pt" id="M31" style="vertical-align:-3.1815pt" version="1.1" viewbox="-0.0498162 -8.6359 14.9866 11.8174" width="14.9866pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M743 650H503L496 622L527 618C563 613 564 603 532 573C449 495 371 431 323 392C301 374 272 355 246 346L280 522C297 609 300 614 379 622L385 650H135L129 622C209 614 215 609 198 522L124 133C106 39 99 35 23 28L17 0H271L277 28C193 35 192 39 208 133L239 316C264 328 280 325 303 288C368 183 435 90 502 0H652L659 28C602 34 584 43 543 94C495 154 403 283 347 369L574 554C634 603 659 612 735 624L743 650Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,9.23,3.132)"><path d="M567 167L534 181C505 122 482 94 454 70C428 46 385 42 330 42C288 42 248 44 235 55C216 70 213 91 220 130L295 528C310 609 314 611 401 618L409 650H140L131 618C222 611 224 609 209 528L133 126C118 47 108 41 25 33L18 0H497C514 33 554 126 567 167Z"></path></g></svg></span></td><td class="align_center">300</td><td class="align_center">400</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Improved model dimensions for an annular slot ejector.</div>

Mathematical Problems in Engineering

tab5

Table 5

Table 5: Optimisation Analysis of Structural Parameters of an Annular Slot Ejector Based on the Coanda Effect 