اسئلة في جريان الموائع من يستطيع حلها؟؟


السلام عليكم
عندي بعض الاسئلة في جريان الموائع اريد معرف لحلها
وايضا اذا تعرفوا مواقع عاليوتيوب بيها شرح جريان موائع اتمنى تنزلوها
لان تعبت وانا ادور وما لقيت الا القليل
وهذه الاسئلة

A volute centrifugal pump has the following performance data at the best
efficiency point:
Volumetric flow rate Q = 0.015 m3/s
Total head &h = 65 m
Required net positive suction head NPSH = 16 m
Liquid power PE = 14000 W
Impeller speed N = 58.4 rev/s
Impeller diameter D = 0.22 m
Evaluate the performance of a homologous pump which operates at an
impeller speed of 29.2 rev/s but which develops the same total head &h and
requires the same NPSH.

two centrifugal pumps are connected in parallel in a given pumping system .plot total head Ah against capacity Q pump and system curves for both pumps running on the basis of the following data:

operating data for pump1
h m 40.0 35.0 30.0 25.0&
Q1 m^3\h 169 209 239 265

operating data for pump2

h m 40.0 35.0 30.0 25.0&
Q2 m^3\h 0 136 206 267


data for system

h m 20.0 25.0 30.0 35.0&
Qs m^3\h 0 244 372 470




وشكرااا




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