|
Controlling the vortex rope phenomenon with the help of installing an air admission system at the turbine outlet flow of Masjedsoleyman dam power plant
|
Ghasem Khajeh1   , Reza Poultangari *2 , Afshin Gholipur3 |
1- PhD student, Department of Mechanical Engineering, Aligudarz Branch, Islamic Azad University, Aligudarz, Iran.
2- Assistant Professor, Department of Mechanical Engineering, Dezful Branch, Islamic Azad University, Dezful, Iran. , reza.poultangari@gmail.com
3- MSc, Production and Operation Management Company, Masjedsoleyman Power Plant Dam, Masjedsoleyman, Iran |
|
|
Abstract: (68 Views) |
| In this research, the effects of direct and free air admission in the Francis turbine outlet flow region of the third unit of Masjedsoleyman Dam hydroelectric power plant with a nominal capacity of 250 MW of each unit in mid-load and low-load conditions have been investigated. This action is carried out in order to reduce or eliminate the destructive effect of the vortex rope, which appeared in the conditions of power generation, in the middle or low water levels of the dam lake. The importance of this issue lies in the fact that if the plan is successful, it will allow the related hydroelectric power plant complex to operate the power plant in a wider range of its rated power. In this research, based on the obtained results from literature, an air admission system is used with two air inlet paths with an initial diameter of 4 inches and a conversion diameter of 6 inches where connected to an open top and bottom vertical pipe with a length of 1200 mm, with a diameter of 8 inches.This vetical pipe has 60 number of holes with a diameter of 50 mm, in a position exactly under the lower cone of the turbine and at a distance of 54 cm from it. The air intake of this system was supplied from the free air of the power plant environment, and this air path had the necessary valves to cut off or connect or one-way the air flow when necessary. Due to the presence of strong eddy currents in the installation site of the air admission system, two 6-inch pipes were used in addition to the air transmission pipes of the system, in order to in order to strengthen this system as best as possible. In order to evaluate the effect of air admission, three different methods were used to collect power plant information, which included measuring the amplitude of turbine vibrations, the sound intensity from the turbine body, and finally the hydraulic pressure of the turbine output flow. The obtained results were measured in a stepped manner in power plant loads of 110 to 180 MW. The obtained results show the complete success of the project in all three measured indicators. |
Article number: 6 |
| Keywords: Vortex rope, Francis turbine, air admission system, vibrations, sound intensity, hydraulic pressure |
|
|
Full-Text [PDF 1788 kb]
(48 Downloads)
|
Type of Study: Applicable |
Subject:
Special
Received: 2024/06/4 | Accepted: 2024/09/9 | Published: 2024/09/18
|
|
|
|
|
|
|
| Send email to the article author |
|
|
|
| Add your comments about this article |
|
|
|
