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  1. Q

    Is a rope stronger when looped double?

    if the thickness(diameter) of A is same to B while they work, double-loop B is stronger than A . as long as you analyse the force that each rope section bear. As for double times, I do n't think it is definite. We should consider the friction,and others factors.
  2. Q

    The advantage the constant-volume combustion type gas turbine engine

    Recently I think we can simplify the engine, the compressor will be cancelled, replaced with a fan or a pipe. The inlet gas pressure before combustion will decrease a lot and the total efficiency will be smaller definitely. After studying the principle and designing the structure carefully...
  3. Q

    The advantage the constant-volume combustion type gas turbine engine

    Thank for your reply. Though there is a little words in your reply which I can’t understand, I try to explain as possible as I can. If I design the engine with one pair combustion chambers, one pair outlet pipe, the problem you worried will happen probably. But I design it with several pairs...
  4. Q

    The advantage the constant-volume combustion type gas turbine engine

    I have stated the functions of the branch pipes for the output gas,A reader ever mentioned the front door of the chambers is a importent one. Turly! I summarized the three main functions of the front door. They must be realized. 1, As the passage for the input gas which let the streams of...
  5. Q

    The advantage the constant-volume combustion type gas turbine engine

    I always think of how to expand the use of the engine,recently I think over if it can be used as the jet engine on the rocket flying in atmosphere.Because in this field engines usually are used once, the engine neednt those reinforcement parts, the engine will be much lighter. Compared with...
  6. Q

    The advantage the constant-volume combustion type gas turbine engine

    For years I always hope to find a way to estimate the time spent for each work course: combustion, spouting out off the chambers, exchange gases by suction (fresh gas and burnt gas) in chambers. According to the data from some manuals about the internal combustion engine, I know the combustion...
  7. Q

    The advantage the constant-volume combustion type gas turbine engine

    I have to compensate a little. There is a sentence in the upper derivation "I set the pressure before turbine same as it after compressor. You can the same description appear in #9 floor. You can refer to it.
  8. Q

    The advantage the constant-volume combustion type gas turbine engine

    I try to calculate the temperature before the turbine: Pls see below figure 4: the figure show how I find their relationship of the main parameters in different course. (Sometimes I call constant-volume combustion type as closed combustion type) Normally the pressure after compression is...
  9. Q

    Jet Engine performance in Cold Weather

    Zoraxdoom: “Thus, Thrust can be taken as proportional to (Pressure/Temperature) * (Square root of Temperature) * (Square root of Temperature).” Personally I think the conclusion is not very proper, because "Speed of Airflow through the engine is proportional to the square root of temperature."...
  10. Q

    The advantage the constant-volume combustion type gas turbine engine

    Continue to discuss the feasibillity, Now I discuss the the structure and function of exhaust system, that including the branch pipes, general pipe and turbine. The branch pipe, general pipe,the turbine install behind the chambers. The function of branch pipes behind the chambers: because I...
  11. Q

    The advantage the constant-volume combustion type gas turbine engine

    Thank you for the concerns. I try to answer your questions: “How do you plan on injecting the fuel and air in the rotating chambers? Moreover how do you plan to make it so that it can be considered pre-mixed?”-----Do you know the old type internal combustion engine on gasline? I plan to use...
  12. Q

    The advantage the constant-volume combustion type gas turbine engine

    Hi,oatlids when I published the idea including the structure of the engine on other website. Somebody ever reminded me it is like wave rotor engine. I search the wave rotor engine from internet. I think they are different. the structure are similar, part of principle are same. but the input...
  13. Q

    The advantage the constant-volume combustion type gas turbine engine

    StorminMatt, you also mentioned the heat and cool solution, here I just explain a little of the solutions. In this engine the flow is more easy to control precise than the current engine because of the doule walls and branch pipes system. We can release a little air from the front door to form a...
  14. Q

    The advantage the constant-volume combustion type gas turbine engine

    As to the seal on the flat surface, I know it is difficult. I make the seal a little flexible and with proper contact surface so that it can adjust itself with chambers deformation. Even though there is a little gas leak, as long as the composition is not serious, this part of gas will not...
  15. Q

    The advantage the constant-volume combustion type gas turbine engine

    As you mentioned "fatigue damage". I also noticed it and try to decrease the risk. I adopt proper structure to improve their force condition. for example, I arrange these chambers on a circle position. thus the force on one chamber can be borne by all chambers. the deformation will become...
  16. Q

    The advantage the constant-volume combustion type gas turbine engine

    You ever mentioned, the size and weight is bigger on the new type than the constant pressure combustion type. You should agree, only for chamber, the size and weight is bigger, the new chamber can increase the pressure. in the current engine this part of pressure will be produced by the the part...
  17. Q

    The advantage the constant-volume combustion type gas turbine engine

    then I reply to some of your concerns. The detailed can be searched by E-mail. Firstly (many years ago) I ever thought of rotating chambers. at last I gave up the idea. It seems it need only one outlet pipe. Really the pressure of the gas out off the chamber is variable. so one outlet pipe is...
  18. Q

    The advantage the constant-volume combustion type gas turbine engine

    to StorminMatt: I know the constant-volume combustion type is very easy to cause some problem. my target is avoid these weakness. I hope you study the structure of my engine again. I also hope search my feasibility report from internet. I have mentioned the website before and you can find it...
  19. Q

    A trange iron

    basically I think it is man-made. I never hear there is a foundry there though my friends already remind me. I think it is from a mechanical part, It droped to the earth, possible in river, then after wear and tear by sand, then it becomes to the shape. i pick it on the ground , maybe hill. I...
  20. Q

    A trange iron

    more photos, I hope somebody can tell me what it is.
  21. Q

    A trange iron

    until to recent days, I get a spectrum ways to test its composition. It is strange. I do not know what it is originally. Sn 0.048%; Mo 0.089%; Zr 0.014%; W 0.089%; Zn 0.062%; Cu 0.195%; Fe 96.873%; Mn 0.844%; Ti O.085%; LEC 0.655%(light element such as Si, C, the machine can not tell the...
  22. Q

    A trange iron

    When I was a child, I picked a iron from the earth. It looks a iron, it has a thin layer rust outside. but the shape looks like a stone. it is about 26mm long. I erase a little rust by knife. then the position will not get rusty afterwards in the room even many years.
  23. Q

    F-35 engine exhaust

    The thing happen is relative to many factors. such as the mass of the plane. it is possible, It is not definitely
  24. Q

    F-35 engine exhaust

    “supersonic speeds” ia relative to local condition. mainly to local temperature for air/gas. supersonic speed for a plane is subject to outside atmosphere. the ourside temperature is low, so the sonic speed should be low. "non-supersonic jet exhaust" is subject to inside gas after burning...
  25. Q

    The advantage the constant-volume combustion type gas turbine engine

    to etudiant and Enthalpy: for example, you can find my article in website http://forum.keypublishing.com/ , then choose section: Modern Military Aviation ,then search " The jet propulsion with closed combustion type" ( Last post 10th October 2012 by qumf ) I also heard there are a few...
  26. Q

    The advantage the constant-volume combustion type gas turbine engine

    to Enthalpy: though I will explain the feasibility of this kind of engine later in this web, now you also can search the topic to get my composition on other website. Here i say a few words. the chambers exhausts gas in turn , and afterwads through a special pipes system to get a steady output...
  27. Q

    The advantage the constant-volume combustion type gas turbine engine

    to etudiant thank for your reply. I correct you a little. the chambers do not rotate. the doors at the both sides do rotate. you can not say " the doors don't need to be closed completely at both sides". It need or not depands on expriment. But i think at the begining of combustion, the space...
  28. Q

    The advantage the constant-volume combustion type gas turbine engine

    I set the compressor/blower before the combustion potion for this kind of jet engine, besides its advantage I have said, such as high efficiency, It has other advantages, by the compressor/blower the engine can work under different work condition as current turbojet , so it has the obvious...
  29. Q

    The advantage the constant-volume combustion type gas turbine engine

    Now I state the work procedure. Let me introduce the new type of engine's work procedure: The first step of procedure is that the blower/compressor suck air and increase the pressure to a proper level; spray fuel into air afterwards or at the latter half of the compression; then through a...
  30. Q

    The advantage the constant-volume combustion type gas turbine engine

    though i have mentioned key portion for the function when I introduce the main work courses. I still need to state the whole stucture of the engine. pls study the figure 1. The left one is the section view per axial, it show almost all main parts. Another two pictures show the main parts: the...
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