1) elliptical tube
椭圆管
1.
Research on the flow across elliptical tube tanks with the finite-element method;
基于有限元方法的横掠椭圆管束流动特性研究
2.
Numerical analysis of fluid flow and heat transfer characteristics on elliptical tube with rectangular fins of air cooler
椭圆管矩形翅片空冷器流体流动与传热特性数值分析
3.
Because of smaller cross-sectional area of elliptical tube, the thickness of the cooling stave will be reduced and cooling water consumpti.
计算结果表明:冷却水管由圆管改为椭圆管后,冷却壁热面最高温度和热应力升高不大,为冷却水管由圆形改成椭圆形提供了理论依据,由于椭圆水管截面积减少,就可以减少壁体厚度和大量节约冷却水量,从而达到降低炼铁成本的目的。
2) elliptic tube
椭圆管
1.
Numerical simulation on flow and heat transfer characteristics of rectangular-wing elliptic tube with interrupted holes
开孔矩形翅片椭圆管流动及传热特性的数值模拟
2.
Heat transfer characteristics and flow behaviors of the elliptic tube with different axis ratio a/b are numerically studied via an implicit finite difference method.
利用隐式有限差分法,对横掠不同轴径比a/b情况下的椭圆管换热及流动特性进行了研究。
3.
In this paper, the heat transfer of a two-dimensional steady-state uncompressible fluid flow across the elliptic tubes was studied .
本文分析了二维稳态不可压缩流体横掠椭圆管束的强迫对流换热问题。
3) oval tube
椭圆管
1.
In this paper, 3-D numerical simulations for air-side performance of fin-and-oval tube heat exchanger with longitudinal vortex generators(LVG) and fin-and-tube heat exchanger were performed.
对带纵向涡发生器的椭圆管翅片换热器和圆管翅片换热器的空气侧表面的换热和流动特性进行了三维数值模拟。
2.
There are two common ways to determine this equivalent round tube: one is to make the cross-sectional area of the round tube equal to that of the oval tube and the other is to make the perimeter of the round tube equal to that of the oval tube.
椭圆管翅式换热器的翅片效率工程上通常是将其转换为圆形翅片管来计算。
3.
Three-dimensional numerical simulation was performed for heat transfer and flow characteristics of fined oval tube heat exchangers with longitudinal vortex generators(LVGs).
对带纵向涡发生器的椭圆管翅片换热器空气侧表面的换热和流动特性进行了三维数值模拟。
4) elliptic cylinder
椭圆管
1.
Experiments have been performed, in which heat-mass transfer analogy and the naphthalene sublimation technique were used, to investigate the local and overall heat transfer characteristics and flow behaviors of an elliptic cylinder of axis ratio 1 6∶1 in crossflow of air.
0椭圆管的局部及平均换热特性以及流阻进行了实验研究。
2.
Heat transfer characteristics and flow behaviors of elliptic cylinders with different axis ratio k in crossflow are investigated experimentally.
对横掠不同长径比的椭圆管的换热和流动特性进行了研究。
5) elliptical fin-elliptical tube
椭圆翅片椭圆管
6) oval pipe
椭圆形管
1.
The forming method of oval pipe is introduced and the observed problem during strips transformation of different grade material with two different forming method.
介绍了椭圆形管的成型方法,并用两种不同的成型方式,说明了不同材质的带材变形时应注意的问题。
补充资料:椭圆函数与椭圆积分
椭圆函数与椭圆积分
Elliptic function and integral
叮写成R,[丫(。口+·了’(。RZ「犷(二)」的形式,其中R,(二,),尺:(二1)为二,的有理函数,亦可用夸函数及。函数表示。如遇退化情况,则得初等函数。 日函数函数断,旧一乙二八成吧一,)(12)其中:固定,且lm:>o,这是:的偶的整函数。它具有周期1,当将v增加:时,它要乘上‘汗‘今+”,在点:1一刀,十(),十1/2):()I,,,,为整数)处它有单零点。经常讨论的夕函数有四个0,(.一、ilJ(叶·旧司:+引, 一戈一’2厂’ __、。11+rl姚‘.’一洲‘、“’夕(t,十飞一-)·夕3(:)=0(:1+l/2),夕、(:,)=夕(:1)。(13)夕(才/2,二l)满足偏微分方程刁2夕/丙2一妙/决,并有一个简单的拉普拉斯变换。椭圆函数与椭圆积分可用夕函数表示,对维尔斯特拉斯函数而言,:一。‘/、,对雅可比函数或勒让德规范形式的椭圆积分而言,:-;K’/K。 变换理论一个椭圆函数的周期集可用各种原始周期对来描述。由一对原始周期到另一对的改变叫做椭圆函数或椭圆积分的变换。原始周期的商:便经受了一个单应变换:一(二+l,)/(二+d).其中。、.乃,:,d为整数,而D一、d一/)’为正,D叫做该变换的次数。全体一次变换组成一个模群。这些变换的研究是很有理论意义的,对数论有用,并用于对椭圆函数的数值计算。它也和椭圆模函数的研究有关,后者指具有下列性质的解析函数据f(:),只要:与i被模群的变换连系着、那么f(r)便与:(:)代数地联系着。参阅‘傅里叶级数与傅里叶积分”(Fourier series and integrals)条。 [埃尔德里(A.Erdelyl)撰」E(k)一E(二2,k)分别叫做第一种与第二种完全椭圆积分,刀一(1一kZ)’2为补模数.又K‘一K‘(h)一F(二/2,k‘),E‘=E,(k)=F(二/2,k,)。完全椭圆积分作为走的函数时满足二阶线性微分方程,并为居的超几何函数。它们还满足勒让德关系式,KE‘+K’E+KK‘一二/2这是关于k的恒等式。 周期与奇点椭圆积分是多值函数。I的任何两个确定值的差都是某些实数或复数,即所谓周期的整倍数之和。E,F与H都是复变量、一S、n甲的多值函数。这三个函数都在二一士1,士k‘处有支点,而H还在艾一士l)l一’2处有支点。F的周期为4K与2;K‘,E的周期为4E与21(K‘一E‘)由J二o蕊k毛l时完全椭圆积分是实的,故第一(第二)个周期便叫做实(虚)周期。虽则E与F是二一的多值函数,但如果把沿同样路径并对。(l,习采取同样的值而积分得的E,F作为对应值,则君是F的单值函数。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条