绝热层

The effects of filler fiber and flame retardant on ablative performance of EPDM insulation are studied.

研究了填充纤维、阻燃剂种类及用量对EPDM绝热层耐烧蚀性能的影响。

During the study of Solid Rocket Ramjet, ablation of afterburner thermal insulation is a serious problem, which cannot be ignored.

固冲发动机补燃室绝热层的烧蚀问题是目前固冲发动机研制过程中所面临的一个重要问题。

The determination of the collocation place of metal wires, the principle of choosing the quantity of wires and the initial grain type and the ratio of initial burning surface to throat area are stated.The local ablation of thermal insulation barrier in nozzle convergence region and of throat insert is analysed.

论述了金属丝布置位置的确定及金属丝根数的选择原则；初始药型及初始面喉比的选择；分析了喷管收敛段绝热层及喉衬的局部烧蚀问题；阐述了过渡段燃面变化的计算方法，并附有计算机程序。

Insulation merely slows down the rate of heat exchange, it does not prevent it altogether.

绝热层所起到的作用仅仅是延缓热交换的速度，而不是阻止热交换的进行。

First by testing the practical multilayer insulation in a cryogenic tanker, which is the carilometer in my paper,some affecting factors on multilayer insulation are analysed, then by using the low-temperature and vacuum environment caused by multilayer insulation, the effective thermal conductivity of multiple fiber paper with 5 layers is tested.Through Newton interativemethod,an empirical formula is deduced to computer the thermal conductivity of fiber paper,The errors between experimental thermal conductivity and the calculated conductivity by empirical formula are below10%,so the formula of fiber conductivity can be applied to practical enginnering.

为探索改善工程应用中高真空多层绝热层绝热性能的方法，本文实验研究中首先测量了包扎在实际低温储罐上不同结构的高真空多层绝热层的绝热性能，并分析了环境温度、环境压力，层数、不同隔热材料的组合等因素对工程应用中的高真空多层材料绝热性能的影响；然后利用多层绝热层中的低温真空环境测量5层干法纸在不同温度区间内的表观导热系数，在有限实验数据的基础上用牛顿迭代数值拟和出计算5层干法纸表观导热系数的经验公式，对比经验公式计算值和实验测量值，发现二者的误差在10%以内，因此在工程应用中可用本文的经验公式计算干法纸在低温下的导热系数。

The liner is a polymeric elastomer coating between propellant and insulation layer or case.The liner-forming is a special step in production of solid rocket motor.

衬层是推进剂与绝热层或壳体之间的高分子弹性体涂层，衬层成型是固体火箭发动机生产中的一种特种工序。

Because thermal insulation was in oxygen-riched condition of afterburner and charred layer was porous, oxygenous gas in mixture would penetrate into charred layer and chemical reaction would take place in whole charred layer, which intensified the ablation process.

通过对烧蚀后试件的详细分析，认为绝热层烧蚀过程中燃气流中的氧化性组分会渗入炭化层内部，在炭化层内的孔隙中与材料发生放热的化学反应，大量消耗碳，加剧了烧蚀的过程。

The charring layer is easy to exfoliate when the combustion gas ablates the EPDM insulation at a certain angle.

结果表明，在不同烧蚀时间内，EPDM绝热层的烧蚀率表现出不同特征，EPDM绝热层烧蚀率与燃气流量成正比关系，燃气以一定角度侧向烧蚀绝热层时，炭化层极易脱落。

The wall of archives storehouse is a compound wall consisting of waterproof layer + protective layer + damp course + thermal insulation layer+ heat accumulation layer + interior decorative surface.

档案库房的墙体是一个由防水层+防护层+防潮层+绝热层+蓄热层+内饰面组成的复合墙体。

YTS compound is mainly used to warm foaming agent concrete foam insulation, foam concrete insulation, thermal insulation layer of the production, it could cement, magnesia, lime, gypsum, powder, sawdust, fly ash, sand, Pak Nai paper sludge and other raw materials, foam, made of foam concrete, wall board, lath, block, hollow brick, heat pipe protection kits, roof insulation foam board and other lightweight building materials, also can be used for the production of roofing insulation layer.

HTD-1型复合发泡剂主要应用于地暖泡沫混凝土绝热层、泡沫混凝土隔音、保温垫层的生产，其可对水泥、氧化镁、石灰、石膏、石粉、锯末、粉煤灰、沙、造纸废渣白泥等多种原材料发泡，制成泡沫混凝土、隔墙板、板条、砌块、空心砖、实心砖、热力管道保护套、屋顶隔热板等多种轻质泡沫建材，也可用于屋面保温隔热层制作。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。