Then this thesis apply iterative computation using fluent software , that means fluent is successfully used in the research of porous aerostatic bearing field for the first time 然后用計(jì)算流體力學(xué)中的fluent軟件進(jìn)行迭代計(jì)算,成功地將其引入到多孔質(zhì)靜壓軸承研究領(lǐng)域。
The complex pressure distribution in the model makes the fluid flow computation of horizontal well be fairly complicated , so the non - linear equation describing fluid flow performance has been applied for space iterative computation followed by time iterative computation 由于所用氣藏模型壓力分布較為復(fù)雜,使得水平井的流動(dòng)計(jì)算變得相當(dāng)復(fù)雜,應(yīng)用表征流動(dòng)特性的非線性方程對(duì)空間進(jìn)行迭代計(jì)算,再向時(shí)間推進(jìn)。
As to the poor performance of klobuchar ionospheric correction model , a new method using a constant scale factor is presented ; gps satellites with negative elevation angles are found in observations , therefore , they should be deleted at positioning to improve observation geometry and precision . with the respect to effects of initial values on positioning , iterative computations should be executed after getting direct solutions from gps equations when positioning intervals increase , especially longer than 5 seconds 針對(duì)klobuchar電離層改正模型精度較差的問(wèn)題,提出了定常因子修正法;由于發(fā)現(xiàn)在觀測(cè)數(shù)據(jù)中存在負(fù)仰角衛(wèi)星而造成定位精度大大下降,本文提出在定位時(shí)應(yīng)剔除負(fù)仰角衛(wèi)星,從而改善觀測(cè)幾何,提高定位精度;鑒于初始值對(duì)定位有較大影響,本文指出隨著定位時(shí)間間隔的增加,尤其是大于5秒后,應(yīng)先用直接法求初值,然后再迭代計(jì)算。
3 . developed simply and practical fluid network algorithm for large - scale of pipe networks , such as air - gas system and powder manufacture system . iterative computation used in this algorithm is not only astringing quickly and numerical calculating steadily but also cater the required ratio of precision and guarantee the real - time and any performance simulation of fluid network 3 、本文對(duì)風(fēng)煙系統(tǒng)和制粉系統(tǒng)等大型管網(wǎng),建立了簡(jiǎn)單實(shí)用的流體網(wǎng)絡(luò)模型算法,此法在迭代計(jì)算中,不僅可以快速收斂和數(shù)值計(jì)算穩(wěn)定,而且滿(mǎn)足一定的仿真精度,較好的保證了流體網(wǎng)絡(luò)的全工況實(shí)時(shí)仿真。