After i generate random numbers of x, how can i use this random x values to the rest of the code one by one. Because after that, I want to plot a friction factor-x number grapt with this different numbers
1 回表示 (過去 30 日間)
古いコメントを表示
x = 0.05 + (0.1-0.05).*rand(10,1);
Perimeter = (pi*HydraulicDiameter);
NumberOfCoolantChannels = 3;
Npass = 1; ...Number of Passes
% Ac = (pi*(HydraulicDiameter^2)/(4)); ...Single channel flow cross section
Ac = 1.571e-5;
Atotal = NumberOfCoolantChannels*Ac; ... Total Flow Cross Section
BladeMassFlow = (CoolantBleed/100)*(TurbineMassFlow/NumberOfBlades);
ChannelMassFlow = (BladeMassFlow/NumberOfCoolantChannels);
RibHeighHydraulicDiameterRatio = x;
FrictionFactor2 = 1.447*(1.14-2*log10(x))^-2; %transverse ribs
0 件のコメント
採用された回答
Geoff Hayes
2020 年 5 月 18 日
isilay - since x is an array then you can use element-wise power to calculate the friction factor. Just change your line of code to
FrictionFactor2 = 1.447*(1.14-2*log10(x)).^-2; %transverse ribs
where a '.' is placed in front of the exponent operator.
16 件のコメント
Geoff Hayes
2020 年 5 月 19 日
isilay - I think that you need to step through each line of code (using the MATLAB debugger) and verify that all variables are as you expect and that, given their dimensions, the code is performing the correct operation.
Stephen23
2020 年 5 月 19 日
編集済み: Stephen23
2020 年 5 月 19 日
"...i thought that i should put dot every variables which affect the X and Friction factor"
But those are not the only non-scalar variables in your code. These ones are too (or probably should be):
BulkVelocity
ChannelCoolantMassFlow
BladeCoolantMassFlow
PercentageCoolantBleed
Re
Nu
InternalHeatTransferCoefficient
TechnologyFactor
MassFlowFunction
etc. etc.
Why? Lets have a look at the definition of BulkVelocity:
BulkVelocity =sqrt((OverallPressureDrop./FrictionFactor2)*(HydraulicDiameter/(Npass*BladeSpan*10.^-3))*(2/CoolantDensity));
% ^^^^^^^^^^^^^^^ non-scalar
Atleast one of its defining terms is non-scalar. There are no operations to reduce the size of that array, so BulkVelocity will also be non-scalar (with the same size as FrictionFactor2). And exactly the same for all the other variables listed and some more (because I stopped checking at that point).
You need to be much more thorough and actually look at the sizes of all of the variables, and then use the appropriate array operations. Note that if you are not perforning any linear algebra you could simply replace every matrix operation with an array operation (this would likely be much less effort than checking every variable).
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Creating and Concatenating Matrices についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!