matstral matstral

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  • November 5, 2014 at 7:15 pm in reply to: Heat transfer coefficients #476
    matstral matstralmatstral matstral
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    @farnau wrote:

    In the last versión of OpenWAM

    C1=Cw1+Cw2*(Cu(alpha)/Vp)

    and

    C2=0.001

    I have seen the Literautur. C1 should stand for 2 number。 one for gas exchange period: C1=6.18+0.417Cu/Cm ，and one for the rest: C1=2.28+0.308 Cu/Cm。 But in the Openwam we do not have two choice to define them for the different Phase。 So I want know, how would that be ? I will appreciate your answer！ Please help!

    November 4, 2014 at 12:08 pm in reply to: how to define the injection system ? #495
    matstral matstralmatstral matstral
    Member

    @farnau wrote:

    ACT is an alternative. If you use, you cannot impose heat release law. Regarding your data it has no sense an injection pulse with 0 % of mass. 0.5 + 1 is different to 100%. In openwam, the angle for combustion top dead centre is equal to 0. I will check the meaning of the coefficients later. I don’t have the information available in this moment.

    Thank you very much. please tell me the the meaning of the coefficients later. i will wait for that。

    November 4, 2014 at 8:56 am in reply to: how to define the injection system ? #492
    matstral matstralmatstral matstral
    Member

    @farnau wrote:

    In the injection pulse tab you can press the button + in order to add a new injection pulse. The information that you must provide is the start of injection and the percentage of fuel mass injected in the pulse. The mass injected by all pulses must sum 100%.

    The coefficients that you show are used to build the shape of the injection rate but I need check the exact meaning of each coefficient because I don’t remember. We usually impose the heat release rate and this capability is not commonly used.

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