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    #1

    Replace_right sentence

    Hi friends,

    I have two questions.

    General question:Is the following sentences correct grammatically?....If it is not , kindly suggest ways to make it clearer.


    question1:Is position of colored red word correct"with existence"?.........And also, what word can be replaced with this word?

    Sentence:

    Entropy generation analysis of Wells turbine requires correct estimation of flow irreversibilities around the turbine blades. This can be effectively done via a fine mesh and with existence the tip gap region.

    question2:according following sentences, how can to change the sentences? ......What does " if and where" mean?....In general, what does the following sentence mean?.......Is design a Subject?..or a verb?...or a noun?....for further explain, entropy generation is key parameter in designing blade of turbine. Now in this discussion, the some zones of blade have the high entropy generation, these zone are bad and requires to be controlled to reduce entropy generation, thus conserving useful energy.

    Sentence:

    "The entropy generation rate is computed locally, to assess if and where the design could be
    improved."



    thanks for your answers.

    best,

    Ali

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    #2

    Re: Replace_right sentence

    Hi friends,

    Is the following sentences correct grammatically?....If it is not , kindly suggest ways to make it clearer.

    Are position of words "in term of" and "up to" correct?

    according to figure,how can to change following sentences?

    sentences:

    Fig .5 demonstrate the quite good agreement up to the stall point obtained between numerical method and experimental data in term of efficiency for this numerical model.


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    #3

    Re: Replace_right sentence

    Hi friends,

    Is the following sentences correct grammatically?.....for for further explain,The computation was carried out with changing the rotational speed of the rotor from a high speed to a low speed under a constant axial velocity.

    sentences:

    Values of the flow coefficient from fi=0.105 up to fi=0.25 are obtained by varying the turbine rotational velocity and keeping constant axial velocity.

    thanks every body

  1. lotus888's Avatar
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    #4

    Re: Replace_right sentence

    #2) Fig. 5 shows agreement between the numerical methods and experimental data in terms of efficiency for this model up to the stall point.

    #3) Values of the flow coefficient from phi=0.105 to phi=0.250 were obtained by varying the turbine rotational velocity, while keeping the axial velocity constant.


    --lotus
    Last edited by lotus888; 02-Apr-2015 at 23:09.

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    #5

    Re: Replace_right sentence

    Hi,

    thanks,

    Is the following sentences correct grammatically?.......If it is not , kindly suggest ways to make it clearer.


    Sentences:

    According to Fig .6, by going far away from the hob toward the tip of the blade, the turbine torque and the static pressure difference increases because contact surface of air-flow on blade increases especially in the leading edge portion.
    .................................................. .................................................. ..........................................

    for further explain, hob is low surface of the blade, and tip is up surface of the blade.

    thanks for your answer

  2. lotus888's Avatar
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    #6

    Re: Replace_right sentence

    According to Fig. 6, as we move away from the hob and toward the tip of the blade, the turbine torque and the static pressure difference increases because the air-flow contact surface on the blade increases, especially in the leading edge portion.

    Note how Fig. 6 is written.


    --lotus
    Last edited by lotus888; 03-Apr-2015 at 20:27.

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    #7

    Re: Replace_right sentence

    Hi,


    Are the following sentences correct grammatically?.........If it are not , kindly suggest ways to make it clearer.

    1.The entropy generation analysis used in this work proved its ability to provide the designer with helpful details about the flow field.

    2.Deflection of velocity vectors as well as non-uniform velocity and pressure distribution at the leading edge are due to the wake of upstream blade.

    3.Future research should focus on improving the tip clearance region in order to enhance monoplane Wells turbine performancein term of entropy generation analysis.

    4.High values of velocity gradients in these zones requires to be controlled to reduce entropy generation, thus conserving useful energy.

    5.Whatever entropy generation moves towards zero, the irreversibilities and losses will decrease.

    6.Another reason for high entropy generation at blade tip is due to leakage flow region extends toward the leading edge as the flow coefficient increases.

    7.Good understanding of the energy conversion process and losses mechanisms of Wells turbines is needed for optimizing design and performance of these type of energy convertors.

    what word can be replaced with this word"losses mechanisms"?


    I am really grateful to you, dear friend

    Thank you for your time spent


    best,

    ali

  3. lotus888's Avatar
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    #8

    Re: Replace_right sentence

    Quote Originally Posted by ali_dd View Post
    Hi,


    Are the following sentences correct grammatically?.........If it are not , kindly suggest ways to make it clearer.

    1.The entropy generation analysis used in this work proved its ability to provide the designer with helpful details about the flow field.

    2.Deflection of velocity vectors as well as non-uniform velocity and pressure distribution at the leading edge are due to the wake of upstream blade.

    3.Future research should focus on improving the tip clearance region in order to enhance monoplane Wells turbine performance in terms of entropy generation analysis.

    4.High values of velocity gradients in these zones requires them to be controlled, to reduce entropy generation, thus conserving useful energy.

    5.Whenever entropy generation moves towards zero, the irreversibilities and losses will decrease.

    6.Another reason for high entropy generation at the blade tip is due to the leakage flow region extending toward the leading edge as the flow coefficient increases.

    7.Good understanding of the energy conversion process and the mechanisms of performance loss of the Wells turbines is needed for optimizing the design and performance of these types of energy convertors.

    what word can be replaced with this word"losses mechanisms"?




    I am really grateful to you, dear friend

    Thank you for your time spent


    best,

    ali

    See edits above.

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    #9

    Re: Replace_right sentence

    Quote Originally Posted by lotus888 View Post
    See edits above.
    Hi lotus,

    thanks,

    Only, in the case of sentences "High values of velocity gradients in these zones requires them to be controlled, to reduce entropy generation, thus conserving useful energy.".......

    What is this word"them" for?........in fact, I want to say that some zones have High values of velocity gradients, Now these zone should be control, to reduce entropy generation in these zones. in other words, we require that these zones control(with optimizing the surface of the blade , etc) , to reduce entropy generation in these zones.

    totally, these "High values of velocity gradients" are that should be control.

    here, Another question:

    what word can be replaced with"totally"?....Is it suitable in the above sentence(totally, these "High values of velocity gradients" are that should be control.)?

    thanks,

  4. lotus888's Avatar
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    #10

    Re: Replace_right sentence

    "High values of anomalous velocity gradients in these zones requires them to be controlled..."


    "These anomalous velocity gradients need to be controlled."



    --lotus
    Last edited by lotus888; 03-Apr-2015 at 22:54.

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