(a) A 1:10 scale model of Francis' turbine system has a diameter of 50 cm and works with 380 rpm to produce 70 kW. It is required to build a similar prototype with a specific speed of 350 and a hydraulic efficiency of 80 %. The guide vane deflects the water with an angle of 30° with the tangential direction with constant velocity of flow. The total energy loss between the turbine runner exit point and the tail race is one seventh of the kinetic energy at exit from the runner. Investigate the possibility of cavitation if the turbine delivers water to tailrace with a velocity of 0.4 m/s. Find the suitable height for the turbine to be placed above the tailrace and to work without cavitation. Take the atmospheric and vapor pressures as 1 bar and 0.04 bar respecti vely.
(a) A 1:10 scale model of Francis' turbine system has a diameter of 50 cm and works with 380 rpm to produce 70 kW. It is required to build a similar prototype with a specific speed of 350 and a hydraulic efficiency of 80 %. The guide vane deflects the water with an angle of 30° with the tangential direction with constant velocity of flow. The total energy loss between the turbine runner exit point and the tail race is one seventh of the kinetic energy at exit from the runner. Investigate the possibility of cavitation if the turbine delivers water to tailrace with a velocity of 0.4 m/s. Find the suitable height for the turbine to be placed above the tailrace and to work without cavitation. Take the atmospheric and vapor pressures as 1 bar and 0.04 bar respecti vely.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
i need the answer quickly
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 3 steps with 1 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning