資源描述:
《輸送管壁溫對(duì)膏體推進(jìn)劑燃速的影響》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、第36卷第5期2010年10月火箭推進(jìn)JOURNALOFROCKETPROPULSIONV01.36.№.5Oct.2010輸送管壁溫對(duì)膏體推進(jìn)劑燃速的影響張家仙,朱尚龍,王燕娜(北京航天試驗(yàn)技術(shù)研究所,北京100074)摘要:膏體推進(jìn)劑作為一種新型特種推進(jìn)劑,具有廣闊的應(yīng)用前景。膏體推進(jìn)劑燃速直接影響發(fā)動(dòng)機(jī)內(nèi)彈道性能,研究輸送管道壁溫對(duì)推進(jìn)劑燃速的影響具有重要意義。采用冪律本構(gòu)方程表征膏體推進(jìn)劑粘度,Arrhenius方程表征溫度對(duì)粘度影響,并利用中心有限差分格式對(duì)控制方程進(jìn)行離散。對(duì)恒定壁溫下的膏體推進(jìn)劑與管道間傳熱特性進(jìn)行數(shù)
2、值仿真,并進(jìn)行了數(shù)值驗(yàn)證。結(jié)合仿真結(jié)果,并借鑒固體推進(jìn)劑初溫與燃速關(guān)系,分析了熱管道內(nèi)膏體推進(jìn)劑燃速特性。結(jié)果表明:近壁面加熱層厚度隨入口速度增高而減小,隨管徑增大而增大,管內(nèi)膏體推進(jìn)劑平均燃速較入口溫度條件下有所提高,同時(shí),高溫壁面條件下,近壁面推進(jìn)劑溫度高于爆發(fā)點(diǎn),需要考慮管道內(nèi)的防竄火措施。關(guān)鍵詞:膏體推進(jìn)劑;燃速;傳熱;輸送管中圖分類號(hào):V439.34文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):(20lo)05-0031一05Influenceofwalltemperatureoffeedlineonpastypropellantburnin
3、grateZHANGJia-xian,ZHUShang·long,WANGYan-na(BeijingInstituteofAerospaceTestingTechnology,Beijing100074,China)Abs蛔ct:Asanewkindofpropellant,pastypropellanthasabrightprospectinapplication.Theburningrateofpastypropellanthasadirectinfluenceoninteriorballisticsofengines,80
4、itisveryim-portanttostudytheinfluenceofwalltemperatureoffeedlineonthepastypropellantburningrate.Thepower-lawconsti.tutiveequationandArrheniusequationareadoptedtocharactertheviscosityofpastypropellantandtheinfluenceoftemperatureontheviscosityrespectively.Thecentralfini
5、tedif-ferenceschemeisusedtodispersethecontrolequations.Aftervalidatingthenumericalmethod,thenumericalsimulationonthecharacteristicoftheheattransferbetweenthepastypropellantandfeedlinewerecarriedoutatconstantwalltemperature.Accordingtotherelationshipbetweeninitialtem—p
6、eratureandburningrateofasolidpropellant,theburningratecharacteristicsofthepastypropellantinahotfeedlinewereanalyzedbasedonthenumericalsimulations.Theresultshowsthattheheatedlayerthicknessclosetothewalldecreaseswi廿ltheaugmentofinletvelocityandincreaseswiththeaugmentoff
7、eedlinediameter.Theaverageburningrateofthepastypropellantinfeedlineishigher收稿日期:2010--09—21;修回日期:2010-10-17作者簡介:張家仙(1981—),男,工程師,研究領(lǐng)域?yàn)橐后w火箭發(fā)動(dòng)機(jī)試驗(yàn)32火箭推進(jìn)2010年10月thanthatatinlettemperature.Meanwhile,asthewallisathightemperature,thepropellanttempera—tareclosetothewallishigh
8、erthanthatofitsbreakoutpoint,anditisnecessarytotakeintoaccounttheanti-backfiremethods.KcTworcb:pastypropellant;burningrate;h