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Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?
- a)straight cylindrical
- b)conical type
- c)bell-mouthed
- d)bent tube
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Which one of the following forms of draft tube will not improve the hy...
Purpose of draft tube is to convert kinetic energy into pressure energy, so option (a) wiil not be suitable for the intended purpose of draft tube.
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Which one of the following forms of draft tube will not improve the hy...
Draft Tube and Hydraulic Efficiency of Turbine
Draft tube is a component of a hydraulic turbine that helps in improving the hydraulic efficiency of the turbine. It is a conical or cylindrical tube that is connected to the exit of the turbine runner. The main function of the draft tube is to convert the kinetic energy of the water leaving the turbine into pressure energy, which is then delivered to the tailrace.
Different Forms of Draft Tubes and Their Impact on Hydraulic Efficiency
There are different forms of draft tubes that can be used in hydraulic turbines. Some of the commonly used forms are:
1. Straight Cylindrical Draft Tube: This type of draft tube has a straight cylindrical shape, and it does not improve the hydraulic efficiency of the turbine. The main reason for this is that the water leaving the turbine has a high velocity, which creates a large amount of turbulence in the draft tube. This turbulence results in energy losses, which reduces the hydraulic efficiency of the turbine.
2. Conical Draft Tube: The conical draft tube has a converging shape, which reduces the velocity of the water leaving the turbine. This reduction in velocity results in a decrease in turbulence and energy losses, which improves the hydraulic efficiency of the turbine.
3. Bell-mouthed Draft Tube: The bell-mouthed draft tube has a flared shape at the entrance, which helps in reducing the velocity of the water entering the draft tube. This reduction in velocity results in a decrease in turbulence and energy losses, which improves the hydraulic efficiency of the turbine.
4. Bent Tube Draft Tube: The bent tube draft tube has a curved shape that helps in reducing the velocity of the water leaving the turbine. The curved shape also helps in reducing the turbulence and energy losses, which improves the hydraulic efficiency of the turbine.
Conclusion
In conclusion, the straight cylindrical draft tube is not an effective form of draft tube in improving the hydraulic efficiency of the turbine. The other forms of draft tubes such as the conical, bell-mouthed, and bent tube draft tubes are more effective in improving the hydraulic efficiency of the turbine.
Draft tube is a component of a hydraulic turbine that helps in improving the hydraulic efficiency of the turbine. It is a conical or cylindrical tube that is connected to the exit of the turbine runner. The main function of the draft tube is to convert the kinetic energy of the water leaving the turbine into pressure energy, which is then delivered to the tailrace.
Different Forms of Draft Tubes and Their Impact on Hydraulic Efficiency
There are different forms of draft tubes that can be used in hydraulic turbines. Some of the commonly used forms are:
1. Straight Cylindrical Draft Tube: This type of draft tube has a straight cylindrical shape, and it does not improve the hydraulic efficiency of the turbine. The main reason for this is that the water leaving the turbine has a high velocity, which creates a large amount of turbulence in the draft tube. This turbulence results in energy losses, which reduces the hydraulic efficiency of the turbine.
2. Conical Draft Tube: The conical draft tube has a converging shape, which reduces the velocity of the water leaving the turbine. This reduction in velocity results in a decrease in turbulence and energy losses, which improves the hydraulic efficiency of the turbine.
3. Bell-mouthed Draft Tube: The bell-mouthed draft tube has a flared shape at the entrance, which helps in reducing the velocity of the water entering the draft tube. This reduction in velocity results in a decrease in turbulence and energy losses, which improves the hydraulic efficiency of the turbine.
4. Bent Tube Draft Tube: The bent tube draft tube has a curved shape that helps in reducing the velocity of the water leaving the turbine. The curved shape also helps in reducing the turbulence and energy losses, which improves the hydraulic efficiency of the turbine.
Conclusion
In conclusion, the straight cylindrical draft tube is not an effective form of draft tube in improving the hydraulic efficiency of the turbine. The other forms of draft tubes such as the conical, bell-mouthed, and bent tube draft tubes are more effective in improving the hydraulic efficiency of the turbine.
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Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?a)straight cylindricalb)conical typec)bell-mouthedd)bent tubeCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?a)straight cylindricalb)conical typec)bell-mouthedd)bent tubeCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?a)straight cylindricalb)conical typec)bell-mouthedd)bent tubeCorrect answer is option 'A'. Can you explain this answer?.
Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?a)straight cylindricalb)conical typec)bell-mouthedd)bent tubeCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?a)straight cylindricalb)conical typec)bell-mouthedd)bent tubeCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?a)straight cylindricalb)conical typec)bell-mouthedd)bent tubeCorrect answer is option 'A'. Can you explain this answer?.
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