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1)  petal-shaped fin tube
花瓣管
1.
For petal-shaped fin tube oil-cooler with helical baffle s, as the oil pressure drop in shell side is 90 kPa , the overall heat transfer coefficient of oil_cooler is 3200 W/(m2·K), which is 15% higher than that of low fin tube oil-cooler with helical baffles, and is 5 times as large as that of smooth tube oil-cooler with segmental baffles, so it is an efficient oil-cooler.
对于螺旋隔板花瓣管润滑油冷却器, 当壳程油侧压降为90 kPa时, 其总传热系数可达3200 W/(m2·K), 比螺旋隔板低肋管油冷却器高15%以上, 为普通弓形隔板光滑管油冷却器的5倍左右, 因而它是目前国内外传热效能最高的水冷壳管式油冷却器。
2.
Although it is known that the helical-baffled heat exchanger with petal-shaped fin tubes has excellent heat transfer performance, the shortage of performance data used for design causes it has not been widely used yet in industries.
螺旋隔板花瓣管换热器具有优异的换热性能,但由于目前基础数据不足,螺旋隔板花瓣管换热器的应用还未能普及,研究花瓣管几何结构参数对换热过程的影响规律及传热机理,可为该类型换热器提供设计依据。
3.
The experimental results show,at the same Re,shell-side Nu of helical baffles petal-shaped fin tube single-tube exchangers are about 2-4 times as large as that of helical baffles smooth tube single-tube exchanger,but pressure drops are only about 1.
实验结果表明,在相同的Re值下,螺旋隔板花瓣管单管换热器的壳程传热准数Nu是螺旋隔板光滑管单管换热器的2~4倍,压降只是它的1。
2)  petal shaped fin tube
花瓣状翅片管
1.
Heat transfer and pressure drop characteristics of petal shaped fin tube and low finned tube heat exchanger with helical baffles were introduced,in which compressed air folwing in the shell side.
以现场的压缩空气为工质 ,分别对花瓣状翅片管 (以下简称为 PF管 )与低肋管在螺旋隔板支承下的传热与流阻性能进行实验研究。
2.
In this paper,it introduced heat transfer and pressure drop characteristics of different tubes,Petal shaped fin tube and Low finned tube,under helical baffles,while compressed air flowing in the shell side.
以现场的压缩空气为工质,分别对花瓣状翅片管(PF管) 与低肋管在螺旋隔板的支承下的传热与流阻性能进行了实验研究,研究结果表明花瓣状翅片管比低肋管具有更优越的传热性能,在同等的传热量下,PF管螺旋隔板换热器的气侧传热系数比低胁管螺旋隔板换热器高出20 % ~50 % ,其压力损失比低肋管低30 % ~40 % 。
3)  Petal fin formed tube
花瓣状翅片管
1.
Experimental study is conducted to investigate heat transfer enhancement and flow resistance performance of air transversal flow over Petal fin formed tube,and mechanism of heat transfer enhancement is also analyzed herein.
以空气为介质横向冲刷花瓣状翅片管(包括单管与管束)进行强化传热与流阻性能实验研究,并对其传热强化机理进行分析,结果表明,花瓣状翅片管的非连续周向翅片具有极好的传热强化效果,在实验范围内(Re=103~2×104),本文提出了横向冲刷花瓣状翅片管传热性能的计算方法与理论分析模型,其计算结果与实验值符合良好。
2.
Experimental study is conducted to investigate the performance of heat transfer enhancement and flow resistance of air longitudinal flow over smooth tube and Petal fin formed tube in shell side of heat exchanger.
以空气为介质,以纵向流动方式冲刷光滑管与花瓣状翅片管进行管壳式换热器壳程的传热强化与流阻性能实验研究。
4)  petal shaped fin tube
花瓣形翅片管
1.
The situation,progress and achievement in enhancing heat transfer research of petal shaped fin tube under condensation heat transfer of low surface tension working fluid and its mixture,and the steam including air,and cooling heat transfer of air and oil conditions ,and its practical application prospect are surveied in this paper.
综述了花瓣形翅片管在低表面张力介质及其混合物中的冷凝强化传热、含不凝性气体水蒸气的冷凝强化传热以及空气和油的冷却强化传热等方面的研究概况、进展、成果及其工业应用前景。
2.
In this paper, the heat transfer performance of foed convective Condensation and the heat transfer enhancement mechanism on the petal shaped fin tube (PF tube) are studied.
本文研究了花瓣形翅片管(PF管)在水平套管之环形通道内强制对流冷凝的传热性能及传热强化机理。
5)  petal [英]['petl]  [美]['pɛtḷ]
花瓣
1.
Processing techniques by microwave-blanching and sugar soaking under vacuum for Magnolia Lilielora Desr petal;
微波烫漂与真空浸糖加工紫玉兰花瓣的工艺研究
2.
Studies on petal tissue culture of the traditional Chinese medicine Chrysanthemum morifolium;
安徽药菊花瓣组织培养技术的研究
6)  Petals [英]['petl]  [美]['pɛtḷ]
花瓣
1.
Total RNA was isolated from indigo petals with CTAB method.
利用CTAB法以富含花青素类物质的紫蓝色花瓣为材料提取总RNA,经紫外光谱分析A260/A280比值为1。
2.
Mercedes) as samples, after taking weight records of leaves and petals, different solutions of Abscisic Acid(ABA), Al 2(SO 4) 3·16 H 2O and sucros.
采后玫瑰的花瓣和叶子自始至终均用电子天平精确纪录其质量 ,以示其变化。
3.
Two methods,CTAB-LiCl and Trizol,were used to extract total RNA from petals of lotus,and CTAB-LiCl was accordingly modified in extracting the total RNA in petals of lotus by integrating a polysaccharide-removing step in correspondence with the fact that lotus was rich in polysaccharides and polyphenol.
以荷花花瓣为材料,在比较CTAB-LiCl法和Trizol法的基础上,针对荷花花瓣富含多糖、多酚的特点,在RNA提取过程中加入去多糖步骤,改良了CTAB-LiCl法。
补充资料:花瓣朵朵美容方
    杏花杏花具有补中益气,祛风通络的作用。可以营养肌肤,祛除面上粉刺。宋代的《太平对惠方》中,就有以杏花、桃花洗面治斑点的记载。杏花的美容作用与其含有抑制皮肤细胞酪酸酶活性的有效成分有关。
    李花外用可以除粉刺,使面有光泽。春季李花开时,将花朵摘下,捣烂之后放少许蜂蜜调拌均匀,每晚临睡前当作面膜敷面,效果极佳。
    桃花是最好的养颜妙品,内含丰富的山柰酚和香豆精。将新开的花朵浸入白醋中或低度纯粮酒内,静置,液色微红后即成。洗脸后,取少许甘油与之相揉擦脸。用之洗面亦可,内服尤佳,可延续缓衰老,使人面若桃花,增添娇色。
    茉莉花能收缩毛孔,清爽肌肤,使肌肤光洁细微。当茉莉花开时,摘取没有完全开放的花朵浸入冷水中,密封静放几日后,兑入少许食用纯酒精备用。每天早晚洗脸后用它轻轻拍在脸上,即可达到美容的效果。
    玫瑰花清晨,摘取未全开的玫瑰,整朵浸入香醋中,静置一周,然后对入适量的冷开水制成活肤水,早晚用它洗面。久而久之,可彻底去除面疤、粉刺,使肌肤变得光滑柔嫩。
    百合花将百合花瓣装入玻璃瓶内,注入食用纯酒精后密封,一月后,以2倍的冷开水稀释,对油性皮肤有美白作用。
    荷花荷花盛开时,采集洁净无瑕的花瓣,亦将其晾干切末,拌入10倍量的糯米煮粥,食时加冰糖适量,其味。甜糯可口,冷香袭人,是不可多得消暑美容药验方,能镇心益色,驻颜轻身,变白祛老。
    木槿花盛夏取白色木槿花若干,捣为泥,去渣,与等量上等蜂蜜兑拌即成,注意冷藏防腐。每次取木槿若干,捣为泥,去渣,与等量上等蜂蜜兑拌即成,注意藏防腐。每次取木谨蜜一匙(5毫升),兑开水服,对粉刺、痤疮及面癣有效,同时还可外擦。
    菊花由于甘菊花中的香精油、菊色素等成分有抑制皮肤黑色素形成及活化表皮细胞的作用,有很好的美容养肤作用。所以称其为延年益寿之花。使用菊花美颜可将它制作护肤品或新鲜食之。
    ——摘自《中国供销商情绿化与花卉》2002.14
    
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