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qumf

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Everything posted by qumf

  1. I prepared the drawings of the machine and ask others make the parts soon, It will cost me much money. It seems I will build a lab as well. The attached picture is picked from a portion of my assembling drawing.
  2. my dear friends ,I just start to build the propulsion engine. my dear friends, bless me. I don't know what will happen. i studied for several years and at last I still think I should do.
  3. I can't provide the detail, one reason is I can not familize the details without a lot of experient. If the cooperation has the power and understand the thought, he can familize the tolerances gradually. some person or company really to want the perform the machine, he will contact me. if sb has not intension or interest ,even if i tell him much, it is in vain. the project will spent enormous money. personally I think i have disclosed too much. my E-mail: [email protected]
  4. I apprecate you that you still care about me and my project. Yes, I am still alive, I am busy on my livelihood.So I can't spend much time and money on the project of the new engione. I contacted three big chinese companise who make turbo- engine, and hope they can cooperate , but they have not interest though they can not repudiate the thought by any thoery, maybe they think it is too hard to realize the engine, maybe they think they can't get desirable profit, maybe they are afraid to take too big risk. I didn't make a small scale engine. i expect the engine has more efficiency than the curre
  5. the chinese version of the composition was put on the Chinese periodical(nation degree). the periodical name is"China Equipment", Nov-2009 issue
  6. Feasibility and improvement solutions: When I firstly proposed the idea in my patent(That patent has been out of valid time), I didn’t use the blower or compressor in my engine. Now I prefer to adopt the blower/compressor in engine before combustion after I think it over. It really has a lot of advantages. 1. Without the blower/compressor the engine may have difficulty to be started or on work in slow speed because it may not get enough air. 2. Increasing pressure of air before combustion can increase efficiency considerably. 3. Without compression before combustion, the size of chamber will b
  7. Calculate the temperature before the turbine: Pls see below figure 4: The method also is used to calculate the temperature of each course. Under some condition, when the pressure after compression is pretty high, reducing the pressure by combustion in some extent, the efficiency reduce a little, meanwhile the temperature before turbine reduce much, I state a example: Set the temperature of outside air: 300K, k=1.4, set the pressure after compression/before compression α=7, the pressure after combustion/before combustion β=7.5, thus the temperature turbine 2206K; theory efficiency: η=60.2%; k=
  8. The figure 3 shows the gas pressure at different courses (in different places), it is rough, and the exact details will is rather complicated. There might be a little mistake. Pay attention, the figure just shows main portion of the flow. The figures of temperature and gas velocity are more complicated, Please pay attention, there is a red horizontal line inside the figure, it shows that the pressure at two places have some relation, against the relation the engine can't work orderly. This figure isn't precise .
  9. Working cycle analyses and efficiency (please see figure 2): Estimate the theoretic efficiency; compare the two types of engines: the current engine and I proposed. Firstly I state some premises: 1. Because the efficiency of the current compressor and turbine in current turbo-generator is very high, the below calculation ignore the energy loss in them. 2. In below analyses I assume that the portion's efficiencies are same if they have the similar function component. Meanwhile I ignore some small loss during courses. I set a sample example with data to explain, I assume the pressures are sam
  10. Firstly I explain the structure in brief. (figure 1) The left one is the section per axial, it show almost all main parts. Another two pictures show the main parts: the front door and back door of the combustion chambers. two doors control and regulate work to complete combustion one by one. Anyone of combustion chambers sometimes sucks mixture gas; sometimes it the combustion happens inside it; sometimes gas exhausts from it. So the chamber sometimes is sealed by the two doors; sometimes it is open on both ends; sometimes it is open on one end. So the door has openings(slots) in it. The two
  11. Design: qumf E-mail: [email protected] 20-Feb-2009 The jet propulsion with closed combustion type Brief structure and main principle: I have an idea of a new jet engine. (It evolves from my patent ZL 95237295.9)The combustion in current jet engine is under consistent high pressure created by compressor. A lot of energy out off from combustion chambers is used to drive turbine for compressor. But I know the efficiency of compressor is not high and the compressor is very heavy, its weight occupies 70% of total engine. Further the compressor also consumes about 2/3 proport
  12. Before I posted a thread with the title of "The Jet propulsion with closed combustion type" under another subject. there are many speeches inside it. They are in a mess. I sort and arrange the speeches and publish in order that others can study and judge easily.I rewite under this subject for more proper. pls understand.
  13. I sort the previous speechs and state. I have a thought to design a new jet engine.pdf
  14. if the brach pipes (or relative space) rotate with the work process, the brach pipes and front doors of chambers are connected together. the internal spece of the front door become much large than before.we can utilise the space install some devices to cool front door, seperate the heat from gas by another air, is good for seal and so on. temporary i don't update the instruture picture.
  15. Since the new type jet engine has the limit: the pressure before combustion can not be very high, otherwise the mixture gas may burn by itself. i try to avoid or reduce the limit. recently i have a idea. we can set the branch pipes before chambers, ther are a pairs or two pairs of the branch pipes that are correspoinding to the chambers while the gas enter them. the branch pipes rotate with the front door, it won't cost much energy. Thus the gas before chambers always flows in high speed, almost no stop gas. gas is hard to burn. even though it will, it has enter the chambers when it burn.
  16. besides using compressor to increasing gas pressure, I adopt closed combustion type to increase pressure, but the new way has its limit: the times of increasing pressure is limited, about 5 -11 in common case; the pressure before ignition can’t be too high if it is in current design, otherwise the temperature of gas will be too high, the combination gas will ignite itself easily. it is not safe under some case. The factor restricts the pressure before pressure. so it limit the efficiency.
  17. I try to explain why the new type engine has more efficiency from another direction, compared with current jet engine, the new engine uses up the same amount mechanical work and chemical energy but gets higher-pressure gas, the gas can make more work if its pressure is higher. So the new type engine has more efficiency. I can conclude that the new engine can get higher-pressure gas because the gas pressure can increase further by the closed combustion course besides by the compressor that also is used in current jet engine.
  18. I have to summarize the advantage of the new type engine and the causes. The advantage is: higher efficiency than current engine. I try to explain the causes in popular language: 1. Beside the common method to increasing the pressure (by blower/compressor), the new type engine uses another method to increase the gas pressure further (by the closed combustion). The gas has higher pressure before it works, it will has higher efficiency (according to thermodynamics). 2. The efficiency of blower/compressor isn’t high, especially in very high-pressure stage. but the compressor will spend a lot of e
  19. When I firstly proposed the idea in my patent(That patent has been out of valid time), I didn’t use the blower or compressor in my engine. Now I prefer to adopt the blower/compressor in engine before combustion after I think it over. It really has a lot of advantages. 1. Without the blower/compressor the engine may have difficulty to be started or on work in slow speed because it may not get enough air. 2. Increasing pressure of air before combustion can increase efficiency considerably. 3. Without compression before combustion, the size of chamber will be much bigger; sometimes the mixture is
  20. Under some condition, when the pressure after compression is pretty high, reducing the pressure by combustion in some extent, the efficiency reduce a little, meanwhile the temperature before turbine reduce much, I state a example: Set the temperature of outside air: 300K, k=1.4, set the pressure after compression/before compression α=7, the pressure after combustion/before combustion β=7.5, thus the temperature turbine 2206K, efficiency:η=60.2%; k=1.4, α=7, β=7, the temperature turbine 2100K, η=59.6%; k=1.4, α=7, β=6.5, the temperature turbine 1992K, η=58.9%; k=1.4, α=7, β=6, the te
  21. I changed illustration about the structure of the engins. mainly I chang the shape of chambers to round. Thus it is good to bear load, especially varied load.I also add the short branch pipes before the front doors of chambers. pls compare it with the provious if you have interest. the previous is in page 3 #25.
  22. The figure shows the gas pressure under different courses (in different position), it is rough, the exact details will is rather complicated. There might be a little mistake. Pay attention, the figure just shows main portion of the flow. The figures of temperature and gas velocity are more complicated, I may provide if necessary. pay attention, there is a red horizontal line inside the figure, it shows that the pressure at two positions have some relation, though it isn't precise in the figure.Against the relation the engine can't work orderly.
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