原链接,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/translate?hl=zh-CN&langpair=en%7Czh-CN&u=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/~teney/XXXXXXXXXXXXXXXXXm 翻译软件太尼玛蛋疼了,错误的东西不少,由于本人英语水平不高,仅修改了一部分,还有部分未修改请原谅。
These cardridges are made of steel, 45 mm in diameter, about 50 cm in length, they're rated for 200 bar and they have a nice 1/4" BSP thread on one end. The goal is to build a 500N/2500Ns motor out of one. I'd like to test it progressively, so, at first, I've built a 100N version. I'll scale up the needed parts to increase thrust once I get it running well. Here are the basic provisional specifications of the final version of the motor:
该发动机是建立从一个大的灭火器CO2容器。
,这些cardridges的钢,45毫米,直径,长度约50厘米,它们额定功率为200巴,他们有一个不错的1/4“BSP螺纹的一端。我们的目标是建立一个500N/2500Ns发动机之一。我想对它进行测试,逐步所以,第一,我已经建立了一个100N的版本,我会扩展所需要的零件,以增加推力,一旦我得到它运行良好。这里有基本的暂行规定最终版本的发动机:
Fuel燃料 Oxidizer氧化剂
O/F ratioO / F比 Chamber pressure腔体压力 Theorical Isp理论框架的ISP Pressurant增压气体 Injection pressure注射压力 Burn time燃烧时间 Average thrust平均推力
| high density polyethylene (HDPE)高密度聚乙烯(HDPE) 85% hydrogen peroxide85%的过氧化氢 (highly stabilized)(高稳定性) 66 35 atm (500 psi)35个大气压(500磅) 240 seconds240秒 liquid CO2液体CO2 55 atm (800 psi)55个大气压(800磅) 5 seconds5秒 500 Newtons (100 lbf)500牛顿(100磅)
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测试08 - 2007年4月13日
I built a new nozzle, made of steel, with some parts I had lying around.我建立了一个新的喷嘴,钢,我已经躺在周围的某些部分。 I don't own a lathe personnally, so it was quite a challenge...我不拥有一台车床personnally,所以这是相当大的挑战... Even so I managed to get a robust and cheap nozzle, with an interchangeable divergent section.即便如此,我设法得到一个强大的和便宜的喷嘴,带有可互换的不同部分。 I cut two ends of fire extinguisher CO2 cartridges, and hold them with the proper fitting, which just screws on both of them.我将灭火器CO2盒的两端,并把它们与合适的,这只是他们两个螺丝。 There is a brass gasket in the throat, which seals the two parts.有一个黄铜垫圈在咽喉,其中密封件的两个部分。 A big viton O-Ring is held on the convergent part with a steel retainer; this thing is a galvanized steel plumbing reducer, that was cut to the appropriate length.一个很大的氟橡胶O型圈举行的收敛与钢保持器,这个东西是镀锌水管,减速机,切割到合适的长度。 All in all this nozzle cost me only $5 and a few hours of work !所有这一切喷嘴只花了我5美元和几个小时的工作!
Results:结果: The test in itself was very successful, I got a quick ignition (0.7s) without the use of an ignition diaphragm (in fact I forgot to put it in the motor during assembly).测试本身是非常成功的,我得到了快速点火(0.7秒)无使用的点火隔膜(其实我忘了把它在发动机在装配过程中)。 The catalyst was only the screws coated with PU and permanganate crystals like in test 07.催化剂是涂PU和高锰酸盐晶体的螺丝喜欢在测试07。 The thrust and chamber pressure were very near the predicted ones of 110N/25bar.的推力室的压力是非常接近的110N/25bar预测的。
The total impulse was of 180 Ns, but since some peroxide was lost again due to a leak before the injector, it's hard to estimate the specific impulse.总冲量为180 Ns,但因为一些过氧化物由于喷油器泄漏前又迷路了,这是很难估计比冲。 With a rough estimate of the leak, I guess it should have been in the 170s range.粗略估计的泄漏,我想它应该是在170范围内。 There is also a clear low frequency oscillation in the measurement of both the Pc and the thrust, but I have no idea of what it is due to...还有一个明显的低频振荡在PC和推力测量,但我不知道它是什么,由于...
注1:该视频是不是很令人兴奋的,因为没有火焰是可见的。 The plume of PE hybrids is by itself quite transparent, and furthermore this test was done under the blazing XXXXXX杂交缕缕本身是相当透明的,而且这个测试是在烈日炎炎下。 Remark 2: I know that the thrust curve doesn't get back to 0N at the end of the burn; it comes from the measurement system, which wasn't designed to measure such small thrusts.
备注2:我知道的推力曲线不回来0N结束时的烧伤;来自测量系统,它不是设计来测量这种小推力。
测试07 - 2007年3月26日
Second test of the 100N version of the motor.100N版本的电动机的第二测试。 The ignition diaphragm is now thicker.点火隔膜是现在变粗。 I also had to fabricate a new nozzle, since I broke the first one while taking it out of the motor after test 06.我也不得不制造一个新的喷嘴,因为我打破了第一个,同时它的电机测试后06。 I also made a different catalyst pack.我也做了不同的催化剂包。 It's a two sections catalyst pack: the first one is composed of screws maintained in the peroxide flow direction, coated with polyurethane and permanganate crystals, and the one is composed of fragments of polyurethane/permanaganate mix, maintained between two steel grids.这是一个两部分的催化剂组:第一个是由过氧化物的流动方向,涂覆有聚氨酯和高锰酸盐的晶体,和1组成的片段聚氨酯/ permanaganate组合之间保持两个钢格栅保持在螺钉。
Results:结果: The good point is that the fuel ignitited almost instantly; it indicates both that the igntition diaphragm worked well, and that the catalyst was quite efficient.好点的,的燃料ignitited几乎立即的,它表明,igntition隔膜运作良好,该催化剂是非常有效的。 The bad point is that the steel grid retaining the catalyst break off; catayst fragments blocked the nozzle throat for a short time, until the throat the wooden nozzle had burned enough to let them get out of the motor.坏的一点是,保留了催化剂的钢格折断; catayst碎片堵住了嘴很短的时间,直到喉咙喷嘴的喉咙已被烧毁,足以让他们飞出发动机。 Furthermore, a small leak at the injector caused some peroxide to be lost, which reduced the burn time.此外,在喷油器泄漏造成了一定的丢失过氧化氢,从而降低了燃烧时间。
The thrust measurement is yet encouraging, since the motor appears to have given +/- 120 N, until nozzle was blocked, which is near the expected thrust of 100N.推力测量又是令人鼓舞的,由于发动机似乎已给定的+ / - 120 N,直到喷嘴堵塞,这是预期推力100N附近。 A more resistant nozzle and cat pack and it will be running again...一个更耐的喷嘴和罐体,它将被再次运行...
测试06 - 2007年3月11日
First test of the 100N version of the motor.
第一次测试100N版本的发动机。
- The
injector is my small aluminium swirl injector (see the
specific page ).
-
喷油器是我的小铝漩涡喷射器(请参阅
特定的页面 )。
- The catalyst is a mix of potassium permangante with polyester, the same I used in my demonstration motor.
-
催化剂是高锰酸钾混合聚酯,我用我的测试发动机。
- The fuel is a monoport grain of black high density polyethylene.
-
燃料是一个monoport的的粮食黑色高密度聚乙烯。
- A small pierced diaphragm, also made of HDPE, is placed just before the nozzle, in order to accelerate the chamber pressure build-up before ignition.
- 一个小型的刺穿隔膜,也高密度聚乙烯制成的,被放置之前的喷嘴,为了加速在点火前的腔室的压力建立。
- The nozzle is made of oak, coated with sodium silicate, which has fire-retardant properties.
-
喷嘴橡木制的,涂有硅酸钠,具有阻燃性能。
- Parts of steel tube are used as spacers between the various elements.
-零件钢管用作各要素之间的
间隔件 。
Results:
结果: The diaphragm appeared to have been to thin; it melt before ignition, allowing the (partially) decomposed peroxide to flow out of the motor.
似乎已经到薄的隔膜,它在点火前融化,使发动机(部分地)分解过氧化物流出。
It thus didn't light.
因此,它不轻。
Only a big puff of steam...
只有一个大蒸汽吹...
目前气态氧聚丙烯燃料发动机的最后一次试车正在准备中,当解决了发动机冷却问题后将会使用这种设计方案进行过氧化氢聚乙烯燃料发动机的试车。