أخوي تقنية للأسف ما قرأت ملاحظة تحت المنحنى عندي أنه الأنابيب لا تتعدى قيمة الباور أكثر من 63 % من الواط الكلي ...
278*36/100 = 100 w
وهذا ما هو واضح في المنحنى ...
هذا النص ...
Here we can see several
curves starting at the zero point which show the relation of the static thrust development with
increasing jet nozzle diameter for various power levels. As can be expected low power levels
lead to small static thrust figures; but what is surprising is the realisation that the thrust for
increasing nozzle diameters only increases slowly at these power levels, i.e. the curves run
very flat. However when we have lots of power
.say above 400W the static thrust gain is
already considerable at rather small enlargement of the nozzle exit diameter. At real high
power levels it pays to chose as large an exit diameter as can be accommodated in the
model (which are probably still smaller than the dimensions seen on currently available EDFs
.
but that.s another story).
At power levels past the 1000 Watt a small increment in the exit nozzle diameter results in
large thrust increases. However, doubling the motor power in the same ducted fan will yield
not more than a 63% increase in static thrust.
نصيحتي لنفسي ولك لا تشتري دي اف أقل من 90 ملمم ...