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。
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 ％ 。
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。
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。
Synthesis of Nickel Hydroxide Flower-like Microspheres by Template-free Liquid Process;
无模板剂液相合成Ni(OH)_2花状微球
Controlled synthesis and characterization of flower-like and hollow wafer-like Mg(OH)_2 crystals;
花状及中空圆片状氢氧化镁晶体的可控合成与表征
Solid dendritic and hollow flower-like SrCO3 particles have been synthesized via adding surfactants CTAB and SDBS as chemical additives to regulate the morphology of the crystal.
以表面活性剂CTAB和SDBS为化学添加剂,采用化学共沉淀法对碳酸锶晶体的生长形态进行调控,成功地制备出了实心的树枝状和花瓣为空心的花状碳酸锶粉体,并用X射线衍射(XRD)、扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)等分析手段对样品进行了表征;最后重点对化学添加剂可能产生的影响机理进行了初步的探讨。
any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers.
任何昙花属的植物，有扁平的有节的不规则的干和美丽的管状花。
a plant of the genus Corydalis with beautiful compound foliage and spurred tubular flowers.
具有美丽的复叶和有花距的管状花的紫堇科植物。
any plant of the genus Xeranthemum native to southern Europe having chaffy or silvery flower heads with purplish tubular flowers.
灰毛菊属的任何一种植物，产于欧洲南部，具有单生包片或银色的头状花序，管状花呈浅紫色。
Class10 Quill: The florets are straight and tubular with open tips.
第十型翻羽型：小花先端直管状，全为舌状花。
The lower, cylindrical part of a gamopetalous corolla or a gamosepalous calyx.
管状部分合瓣花冠或合瓣萼的下部管状部分
The garden is in a state of neglect.
花园处于无人管理的状态。
A ray flower or the corolla of a ray flower.
舌状花舌状花或这种花的花冠
gentian of eastern North America having tubular blue or white flowers that open little if at all.
北美东部的龙胆，花管状、蓝色或白色，花略开或不开。
having a corolla composed of partially or wholly fused petals forming a tubular or or funnel-shaped corolla.
部分或全部花瓣合在一起形成的管状或漏斗形的花冠。
Class11 Spider: Long tubular ray florets which may coil or hook at the ends.
第十一型蜘蛛型：小花长管状，先端盘绕或弯曲。
The messy garden is in a state of neglect.
这个又脏又乱的花园处于无人管理的状态。
THE FIBRILLAR INCLUSIONS IN THE VEGETATIVE NUCLEUS OF AMARYLLIS POLLEN TUBE *
朱顶红花粉管中营养核的纤丝状内含体
The Existing State Managerial Analysis and Countermeasure Research of Human Resources in GinWa Group;
金花集团人力资源管理现状分析及对策研究
Survey on Occupational Health in Panzhihua
攀枝花市职业病危害防治现状调查及管理对策
The hood-shaped sepal or corolla of some flowers.
盔状花冠（或花萼）某些花朵盔状的花萼或花冠
considered the most highly evolved dicotyledonous plants, characterized by florets arranged in dense heads that resemble single flowers.
被认为是双子叶植物纲中最高级的一种，其特点是花冠的大量浓密管状小花，看上去犹如一朵花。
shrub or small tree of New Zealand and Chile having pendulous racemes of tubular golden-yellow flowers; yields a hard strong wood.
新西兰和智利的一种灌木或小乔木，管状的金黄色花朵成下垂的总状花序，；木材坚韧。
A state or time of flowering;anthesis.
花期开花的状态或时期