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塞式喷管设计工具发布+使用说明
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内容:我比较喜欢玩
气氧
酒精的发动机,主要因为是氧化剂易储藏,燃料易购买(其实就是穷,买不起杜瓦瓶等等费钱的玩意儿)。
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13年10个月前
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核技术与核仪器
内容:中国广东核电合营公司【关键词】: 严重事故 全厂断电 喷淋模式 氢气燃烧【分类号】:TL364.4【DOI】:CNKI:SUN:HDLG.0.2004-03-021【正文快照】:1引言核电站在严重事故下, 当氢气、,氧气、水蒸汽摩尔份额满足氢气燃烧条件时,就会发生氢燃或氢爆,产生的静态和动态压力载荷会危及安全壳的完整性。
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喷气推进
科创基金
内容:发动机推力方面的计算:在火箭发动机推力计算准备阶段,搜集了燃料KNSB的有关数据如下所示:标准配方: KN(硝酸钾)65% SB(山梨醇)35%燃烧产物: 二氧化碳 一氧化碳 水 氢气 氧气 氮气 碳酸钾
鸿鹄一号 200N级商业化微型液体火箭发动机
失措001
1年5个月前
发表于
喷气推进
内容:鸿鹄一号为我们团队自主研发的200N级
气氧
乙醇发动机。,该发动机采用
气氧
-乙醇为推进剂 ,推进剂供应系统采用氮气挤压方案,喷注器为互击式喷注器,推力室冷却采用烧蚀冷却。,我们设计并制造了200N级
气氧
乙醇发动机地面原型机。
氨氧化法制硝酸和乙醚的制备(转载)
coulson21
14年8个月前
发表于
化学
内容:硬质试管(4)内装有三氧化二铬催化剂,用来把氨
气氧
化成一氧化氮或水。,4.本实验为放热反应,又是氨气、氧气等多种气体的混合,故在一定条件下会有爆炸发生,所以要在硬质试管(4)的出入导管中放进防爆铜丝,以保证实验能够正常进行。
[原创] 工业电解的一些基本知识——业余情况下电解制备化学品需要注意的问题
TBsoft
7年6个月前
发表于
化学
内容:二、电解时的副反应——电解制备化学品不可忽视的问题电解水,氢
气氧
气体积比接近2:1,这是初中化学常识,因为理论上有:2H2O → 2H2↑ + O2↑但纯水的导电能力很差,为了提高导电性,往往在水中加入少量硫酸或者氢氧化钠,,但如果加入硫酸增强导电性,氢
气氧
气体积比往往明显大于2:1,也就是氧气析出量明显减少了,其原因主要是阳极发生了明显的副反应(某些教材认为是氢
气氧
气在水中溶解度不同造成的,实际上这只是一个非常次要的因素
【转】地球大气层中的氧气含量递减 最终威胁人类生存
玄明
13年9个月前
发表于
地理与地质
内容:耶鲁大学教授罗伯特·伯纳通过对附着在化石树上的琥珀中包含的气泡进行化学分析,对史前时代的大
气氧
含量进行了研究。
[原创]彻底抛弃汽油:电动车辆的未来战略
全能杀手
17年6个月前
回复于
极客DIY
内容:电极的极化一方面降低了输出电压,另一方面升高了充电电压.在小功率场合可以忽略,比如600mA*h的小充电电池,但是作为汽车动力就不能忽视了.同样的原因,低氢超电势的电极也被重视.在物化上面写的很清楚,常压下氢气-,氧气电对电势差为1.23v(实际上氢气-氧气燃料电池的输出电压只有1V),但电解时要1.7v的电压才能分解水,所以低氢超的电极很重要.幸运的是金属电极的超电势一般比较小.可以看出电池的充放电效率实际上还是比较低的
对真空泵的疑问
hambaby
12年1个月前
回复于
物理
内容:油用旧了以后,遭受空
气氧
化老化,蒸汽压与闪点上升,特别有害的是有机溶剂蒸汽与泵油混溶,导致泵油黏度不够,蒸汽压上升;酸、碱性蒸汽腐蚀泵的金属结构,皆导致泵的效率降低。
【火箭技术板块资源索引】
小哈_abc
10年11个月前
发表于
喷气推进
内容:XXXXXXXXXXXXXXXXXXXXXXXX/t/35618 (出处: 科创论坛) 液氧乙醇火箭发动机
气氧
测试~~~~~ XXXXXXXXXXXXXXXXXXXXXXXX/t/51067 (出处:,XXXXXXXXXXXXXXXX/t/50203 (出处: 科创论坛) 200磅液氧乙醇火箭发动机测试成功 XXXXXXXXXXXXXXXXXXXXXXXX/t/63354 (出处: 科创论坛) LOX煤油火箭发动机
气氧
初步试车成功
各种家庭实验党制备硫酸的方法及总结合集
1245413737
7年7个月前
发表于
化学
内容:氧化方法有如下几种 1.空
气氧
化:效率极低,放置时间过长会导致亚硫酸大量分解。
【云谈】业余氨催化氧化制硝为何困难
Gdeestan
1年0个月前
发表于
化学
内容:基本上可以借鉴硫酸工业的论文)机械强度较差需要托网架可能无法承受大气流-工作强度较低2 高温高压及氧气来源 常压法生产,氨-空气1/9混合(理论最佳是9.5%的氨混空气,混不好影响转化率要不炸炉)出炉气再混空
气氧
化冷却后吸收
实验展示:硫酸铜中铜含量的测定
化学小僧
12年0个月前
发表于
化学
内容:过低会使氧化反应不完全,造成结果偏低,终点拖长;如果酸度过高,则碘离子会被空
气氧
化,使结果偏高。
汇报一下我们社团的活动,及建立物联网的设想
落叶兄
8年2个月前
发表于
喷气推进
内容:考虑到民用,自愿的获得便捷性,比较想用
气氧
,汽油/酒精等等来做燃料,降低成本(合适么?)
因为我们想知道。其实你们也想知道。只是你们不知道你们想知道。
博丽灵梦
10年9个月前
发表于
科学技术学
内容:“那火星上有很多氧气和氢气?”,“氧气和岩石中的铁结合了,变成了红色的氧化铁。
用电解氢氧化钠溶液的办法 业余条件下能生产大量氢气么??
银色荆棘
12年7个月前
回复于
化学
内容:避免产生的氢气、氧气混合物从而导致爆炸。
燃料电池系列之二——通气式燃料电池的搭建
火星居士
10年10个月前
发表于
化学
内容:没有做到氢
气氧
气通气完全同步,电池进气断断续续,难以产生恒定电流。
探讨一下“绿色环保蚀刻剂”的成分
TBsoft
9年6个月前
回复于
化学
内容:4]2-、[CuCl4]2-、Cl-等离子,相当于含有CuCl2,CuCl2也可以腐蚀铜,生成CuCl,但在过量Cl-存在下,CuCl也形成[CuCl2]-、[CuCl4]3-等络离子,再被空气中的氧
气氧
化为二价铜离子或者二价铜离子的络离子
燃料电池系列之一——再生式燃料电池的制作
火星居士
10年11个月前
发表于
化学
内容:目前网上制作的燃料电池主要有两种,一种是再生式,先通过电解电解质溶液产生氢
气氧
气进行充电,再利用电解出的气体进行放电。
冲压发动机原理与技术
鹰图小盆友
4年8个月前
发表于
喷气推进
内容:其中①就是加热器,空气、氧气、氢气在加热器内燃烧,产生发动机所需要的具有与高空实际气流有相似特征的高温燃气,燃气通过拉伐尔喷管②加速到马赫数5.6然后进入实验舱③,实验舱内装有超燃冲压发动机,喷管来的气流通过进气道减速增压后仍保持超音速进入发动机燃烧室,个火花塞点燃,形成一个引导火焰.主流空气与氢气被该引导火焰点燃后在加热器内燃烧,提高加入空气的总温.在燃烧中消耗掉的氧气部分再另外补充进去,以保持正常空气中应有的氧含量,温度的高低可由加入气体(空气、氢气、,氧气)的流量比来控制.另外,该加热器采用了再生冷却方法,空气在加热器下游端注入,经过加热器壁夹层返回上游,进入加热器。
“马口铁”的历史
用户已注销
16年5个月前
发表于
科学技术学
内容:锡是比铁不活泼的金属,既不被空
气氧
化又不与水反应,所以有相当强的抗腐蚀能力。
一篇SCI折射国内外科技发展现状
博丽灵梦
10年9个月前
回复于
科学技术学
内容:“那火星上有很多氧气和氢气?”,“氧气和岩石中的铁结合了,变成了红色的氧化铁。
KNSB模型火箭的制作与发射(简易组装型)
zsjzsjzsj
2年3个月前
发表于
喷气推进
动手实践: 实验报导
内容:燃烧产物: 二氧化碳 一氧化碳 水 氢气 氧气 氮气 碳酸钾 氢氧化钾。,KNSB标准配方 KN65% SB(山梨醇)35% 理论比冲 164s实际特征速度 914m/sKNSB的所有数据标准配方: KN(硝酸钾)65% SB(山梨醇)35%燃烧产物: 二氧化碳 一氧化碳 水 氢气,氧气 氮气 碳酸钾 氢氧化钾理论比冲: 164s理论特征速度: 938m/s实际特征速度: 914m/s理论燃烧温度: 1327摄氏度实际燃烧温度: 1247摄氏度理论密度: 1.841g/cm^3熔铸密度
世舟二号模型火箭
zsjzsj
1年11个月前
发表于
喷气推进
内容:燃烧产物: 二氧化碳 一氧化碳 水 氢气 氧气 氮气 碳酸钾 氢氧化钾。,KNSB标准配方 KN65% SB(山梨醇)35% 理论比冲 164s实际特征速度 914m/sKNSB的所有数据标准配方: KN(硝酸钾)65% SB(山梨醇)35%燃烧产物: 二氧化碳 一氧化碳 水 氢气,氧气 氮气 碳酸钾 氢氧化钾理论比冲: 164s理论特征速度: 938m/s实际特征速度: 914m/s理论燃烧温度: 1327摄氏度实际燃烧温度: 1247摄氏度理论密度: 1.841g/cm^3熔铸密度
化学实验基本操作
thallium2012
14年4个月前
发表于
化学
内容:(9)Fe2+盐溶液、H2SO3及其盐溶液、氢硫酸及其盐溶液:因易被空
气氧
化,不宜长期放置,应现用现配。 ,20.配制和保存Fe2+,Sn2+等易水解、易被空
气氧
化的盐溶液时;先把蒸馏水煮沸赶走O2,再溶解,并加入少量的相应金属粉末和相应酸。
白鸟计划(持续更新中)最近更新至2023年11月12日
橘喵Meow
1年8个月前
回复于
喷气推进
内容:就连该帖中的很多仿真竟然都是用sw跑的(俗话说得好,sw跑仿真图一乐)所以我的建议是:lz倒是应该先折腾折腾小型的液体探空火箭,比如小型
气氧
-乙醇探空火箭之类的若是lz有足够的能力的话那可以考虑考虑亚轨道之类的
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