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【提问】固体火箭发动机推力产生原因是什么?
虎哥
4个月28天前
回复于
喷气推进
内容:你猜为什么发动机/
燃料
最关键的参数叫比冲。。。
Re:回 3楼(xj198398xujing) 的帖子
xj198398xujing
14年3个月前
回复于
喷气推进
内容:原来做够类似结构,加工精度低,结果螺栓不能拧进去很费劲,也就是壳体上打的孔的角度和喷管上的螺孔对不上 这个饿…… 只能说你没去对地方了连我这个业余的做出来都基本没有什么误差我想要是专业的嘛应该更好才是
燃料
还是老样子
新人调查贴
bh,王者归来
10年1个月前
回复于
喷气推进
内容:论坛不允许出售含有
燃料
的发动机,此外现在正在从业余火箭转型为开源卫星研制
弱的问一下...希望知道的告诉我一下
侧卫007
14年8个月前
回复于
喷气推进
内容:通过试验证明最好的比例其实是66:34(无水葡萄糖)KNO3计算式里的-0.5就是给K的,K2CO3、KOH都可以看成K2O和CO2反应、H2O反应得到的呐,那只是个氧平衡计算,火箭
燃料
毕竟是要看能产生多大推力而不完全是释放多少能量
用固体酒精的火箭叫什么火箭??
1007643735
10年6个月前
回复于
喷气推进
内容:那首先要考虑纯度,第二是固体酒精,虽然没见过,但是你要保证这种物质要有可溶性,还有就是浇注
燃料
就要最后用了。
ABC微型火箭技术-为初学者设计的快速制作技术
ABC
16年6个月前
回复于
喷气推进
内容:s:251]对了把花生油换成机油我想也不错的.含量为总量的5%加多些硝酸钾只是多点点确实有点累,要处理很多图片还要筛选,画示意图也很累人~~机油我也试过,这些油类效果都一样的,不过是花生油最方便而已,
燃料
的味道还香呢
登天-4发射成功(图片视频贴)
山氰水溴
5年4个月前
发表于
科创基金
喷气推进
内容:点火延时较严重工作完毕砖块和混凝土柱被推了快两米远好在这次成功收集了(不太准确的)试车数据 N 数据量推测高达700N的推力峰是因为药柱的不良脱模增加了初始燃烧面积导致的经过数据处理和计算,得出了各项数据
燃料
质量
KNSU火箭发射报告
江文。
6年5个月前
发表于
喷气推进
内容:火箭总长为650mm,
燃料
采用KNSU,火箭总质量510g左右。,制作
燃料
不需要加5020胶水一类的东西,适当方法可以保证
燃料
的流动性。
环形气动塞式喷管塞锥型面设计+实例计算
LS
5年1个月前
发表于
喷气推进
内容:附:Excel模板5.实例计算以室压4.2MPa,设计推力100N的8单元环簇形塞式喷管为例,特征速度等数据采用748#
燃料
数据。,模型适配壳体内径为20mm,外径为24mm,可以装填任意长度的
燃料
药柱(建议AP系,KN系
燃料
请合理实验)。
【理论贴】关于提高固体火箭发动机效率的讨论
lilith
15年5个月前
回复于
喷气推进
内容:3、 现阶段可行的发动机工作压力及喷燃比个人认为,由于在6MPA左右时,KNDX已经达到了较高的比冲,此时提高工作压力对
燃料
比冲的提高已经没有太大的效果,同时发动机壳体的厚度要大大增加,所以对于大型金属发动机来说,在6MPA左右时,KNDX的”压力——燃速“曲线存在一个拐点,该拐点的存在使得这一压力下的KNDX
燃料
具有一定的“压力自动稳定性”。,但是这一特性的存在,是否会导致工作在
燃料
燃烧拐点的发动机产生震颤,个人并没有相关资料可查。,也就是说,一定程度上,细长的发动机比短粗的发动机效率更高,理由有以下几点:1、 发动机的相当部分重量是来源于喷管和堵头,但是无论发动机多长,喷管和堵头都只有1个,所以长度越长的发动机装药越多,单位质量
燃料
所分担的喷管和堵头的质量就越少,钢最大的优点是在高温下的许用应力是铝合金的数倍,因此钢制发动机的厚度可以做到铝合金发动机的1/2甚至更薄,高强度在一定程度上弥补了钢密度大的缺点,钢材适合在高压力、工作时间长、高能
燃料
的发动机中使用。
我有个无尾翼火箭的想法..............
放牛党主席
10年9个月前
回复于
喷气推进
内容:29 23:29 楼主可以查找一部视频,名字为“流言终结者”,其中有一集就介绍“南北战争”中的火箭,自旋转的,还有古代 ...好像看过,画质超渣.................用的好像是石蜡还是什么
燃料
knsu发动机爆炸,我的分析并求帮助
guaiso
9年0个月前
回复于
喷气推进
内容:引用 红盟大使:直接焦掉是正常的,等您的PVP管材用完后推荐您用PPR管材,按照鄙人的经验来看,PVP比PPR要催,拿来做火箭(尤其是KNSU这种
燃料
),是很容易坏掉的,曾经就被我压爆一个,PPR耐压高
【基本原理讲解】关于喷管特性的说明
Einstein
10年0个月前
回复于
喷气推进
内容:我以前用水泥糊了一个,2cm的KNSU就裂了,不敢上3cm的
燃料
回 楼主(leeqingyang) 的帖子
拔刀斋
12年1个月前
回复于
喷气推进
内容:修订版本:将火箭划分为3个等级区段 A:非金属发动机、箭体为轻质材料、起飞总质量小于1500G、
燃料
质量小于125g、总冲小于320NS,请参照 模型火箭发射规定 发射。
【液机设计软件系列】液体直流喷注器设计
ehco
12年9个月前
回复于
喷气推进
内容:建议再在背后加入一些常用数据的表,比如屈服强度,传热率,以及其它
燃料
的热值,比冲,温度等等。
看了很多,帖子很少。发个发射视频。
pcpyq
13年11个月前
回复于
喷气推进
内容:2分PVC管:120mm尺寸:内径D、喷口0.8D、装药3D、堵头D 、喷口径3.5mmPS:D=20mm
燃料
:KNSU燃烧方式:断面燃烧为了能够相对飞行稳定,就地取材截了3根苇杆用胶带捆绑。
新人来报道,懂化学的来聊聊,高锰酸和高浓度过氧化氢做液相发动机
lily
15年6个月前
回复于
喷气推进
内容:不知道用什么仪器可以测试
燃料
燃烧产生的推力呢?
关于电池的问题
拔刀斋
12年2个月前
回复于
喷气推进
内容:另外,注意温度变化时电子器件和
燃料
火工品结露问题,尤其是在广州温暖潮湿气候下用冰箱模拟实验更容易结露。
今天集中测试了8 个PPR发动机,有2个RAP的出环了,1个RNX好像也有环
fuboxx
9年9个月前
回复于
喷气推进
内容:喷燃比没那么大的,你想,我药柱外径22 中孔9MM,喷口大概7MM -8MM,最后烧完了,扩孔肯定是有点扩,但看样子扩大了大概1MM直径,不是很大再说也需要它自然的扩孔,因为
燃料
到了后期喷燃比比较高,
D2组火箭比赛发射资料(成功发射)
氢离子
11年7个月前
发表于
喷气推进
内容:最后箭体未回收,可以在视频2中听见开伞传来的火药爆炸声,此次发射采用重结晶kndx固体火箭
燃料
,无塑化剂。,XXXXXXXXXXXXXXXX/XXXXXXXXXp/sid/XNTg2NTMyNzgw/v.swf target="_blank" style="font-size:20px;">点击此处查看视频火箭结构图
燃料
,
燃料
总重442g,箭体总重2300克。
换向器电机整体结构
公众号EV技研作者1900
5年6个月前
发表于
电动汽车
内容:23740项汽车专利事件】调查电动汽车背后藏着——石油、战争、地缘政治6分钟完成充电,续航320km——东芝TNO/NCM电池初探老铁,来杯特斯拉专利文献不,电磁口味的【日本庆应大学、群马大学数据】EV与
燃料
车的能量效率对比
麻省理工 人造树叶
justkaka
13年11个月前
回复于
极客DIY
内容:它由硅、电子元件及多种用于刺激化学反应的催化剂组成,可利用阳光将水分解为氢气和氧气,氢气又可在专门的
燃料
电池中生成电。
一个学生的第一把电磁枪(10P)
w1w2d3
16年1个月前
发表于
电磁炮
内容:
燃料
为硝酸钾加蔗糖,但大多是炸上天的[s:233] 后来被叫到办公室了[s:240] 看到科创,我的激情又重新燃烧起来,决定造一把电磁枪。
好吧 来弄一弄液体火箭吧
leeqingyang
13年7个月前
发表于
喷气推进
内容: 2.无线电测向组 Sukhoi乙醇☭ ( 947157094)动力设计 3.发动机组 箭zy-h2 (420313885)spirittry(454884000) 4.液体
燃料
组
猴版对万户\玉免项目航电系统的展示
彩虹之巅
11年8个月前
发表于
喷气推进
内容:一两年的时间内,陆续了解了项目中的一些东西,比如胡震宇同学的发动机、张子林同学的
燃料
,感觉做的都非常好,本人从他们的发帖中学到了不少有用的经验和知识。
液机试车,给力的点火瞬间~~~
神の左手
12年11个月前
发表于
喷气推进
内容:设计推力: 150KG
燃料
:氢化煤油 99.8%气体氧 材质:P20,SKD-61,45#, 炭钢视频如下!
KNSU水管机火箭发射
星航天
2年8个月前
发表于
喷气推进
动手实践: 实验报导
内容:本次发射以KNSU
燃料
为推进药剂,铜制水管发动机,飞行高度目测200米。
业余火箭试车与发射预案公开标准草案,征求意见
虎哥
11年7个月前
回复于
喷气推进
内容:比如:用
燃料
总质量来界定是否公示,以及安全距离。,其中,设计上升高度与火箭
燃料
总质量对应下表中的最小场地值,并取二者中最大者。,上升高度小于10米 小于 50米小于100米场地尺寸10米 100米 300米
燃料
质量小于100g小于500g小于1kg1kg以上场地尺寸5米50米150米 200米设计垂直上升高度大于100米的火箭,
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