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Rotational flow tunnel structure capable of increasing horizontal rotational flow energy dissipation rate
The invention discloses a rotational flow tunnel structure capable of increasing the horizontal rotational flow energy dissipation rate. The rotational flow tunnel structure comprises a horizontal rotational flow well, wherein the horizontal rotational flow well is used for horizontally performing flood discharge operation on water flow. According to the rotational flow tunnel structure capable of increasing the horizontal rotational flow energy dissipation rate, the upstream of a rotational flow tunnel is connected with a swirling chamber, the downstream of the rotational flow tunnel is connected with a transition section and a spillway tunnel, the rotational flow tunnel is composed of a variable-diameter section and an equal-diameter section, water flow enters the variable-diameter section of the rotational flow tunnel from the tangent line of the swirling chamber under certain pressure, fluid which continuously flows spirally moves towards the spillway tunnel along the rotational flow tunnel, and after water flow enters the variable-diameter section of the rotational flow tunnel, the inner diameter of the rotational flow tunnel is gradually reduced, so that the rotation speed of fluid is increased, kinetic energy is increased, the kinetic energy dissipation rate is also increased, the pressure intensity of the tunnel wall is high under the action of the rotating centrifugal force of the water flow, and cavitation erosion damage is not easy to occur; and in addition, the energy dissipation mainly occurs in an inner spiral flow area near an air column formed in the rotational flow tunnel, and the change trend of the energy dissipation on the wall of the rotational flow tunnel is gentle, so that circular convex grooves are uniformly formed in the side wall of the equal-diameter section of the rotational flow tunnel so as to increase kinetic energy dissipation.
本发明公开了一种提高水平旋流消能率的旋流洞结构，包括水平旋流井，其用来水平对水流进行泄洪操作。该提高水平旋流消能率的旋流洞结构，旋流洞上游接起旋室，下游接渐变段及泄洪洞，旋流洞由变直径段和等直径段组成，水流以一定的压力由起旋室切线进入变直径段旋流洞，连续流入的流体沿旋流洞呈螺旋形向泄洪洞运动，水流进入变直径段旋流洞后，由于旋流洞的内径逐渐缩小，使流体的旋转速度加快，动能增大、动能消能率也增大，且水流旋转离心力的作用，洞壁压强高，不易发生空蚀破坏；另外消能主要发生在旋流洞内形成的空气柱附近的内螺旋流区域，而在旋流洞壁的变化趋势较为平缓，故在等直径段的旋流洞侧壁均匀布置圆形凸槽增加动能消能。
Rotational flow tunnel structure capable of increasing horizontal rotational flow energy dissipation rate
The invention discloses a rotational flow tunnel structure capable of increasing the horizontal rotational flow energy dissipation rate. The rotational flow tunnel structure comprises a horizontal rotational flow well, wherein the horizontal rotational flow well is used for horizontally performing flood discharge operation on water flow. According to the rotational flow tunnel structure capable of increasing the horizontal rotational flow energy dissipation rate, the upstream of a rotational flow tunnel is connected with a swirling chamber, the downstream of the rotational flow tunnel is connected with a transition section and a spillway tunnel, the rotational flow tunnel is composed of a variable-diameter section and an equal-diameter section, water flow enters the variable-diameter section of the rotational flow tunnel from the tangent line of the swirling chamber under certain pressure, fluid which continuously flows spirally moves towards the spillway tunnel along the rotational flow tunnel, and after water flow enters the variable-diameter section of the rotational flow tunnel, the inner diameter of the rotational flow tunnel is gradually reduced, so that the rotation speed of fluid is increased, kinetic energy is increased, the kinetic energy dissipation rate is also increased, the pressure intensity of the tunnel wall is high under the action of the rotating centrifugal force of the water flow, and cavitation erosion damage is not easy to occur; and in addition, the energy dissipation mainly occurs in an inner spiral flow area near an air column formed in the rotational flow tunnel, and the change trend of the energy dissipation on the wall of the rotational flow tunnel is gentle, so that circular convex grooves are uniformly formed in the side wall of the equal-diameter section of the rotational flow tunnel so as to increase kinetic energy dissipation.
本发明公开了一种提高水平旋流消能率的旋流洞结构，包括水平旋流井，其用来水平对水流进行泄洪操作。该提高水平旋流消能率的旋流洞结构，旋流洞上游接起旋室，下游接渐变段及泄洪洞，旋流洞由变直径段和等直径段组成，水流以一定的压力由起旋室切线进入变直径段旋流洞，连续流入的流体沿旋流洞呈螺旋形向泄洪洞运动，水流进入变直径段旋流洞后，由于旋流洞的内径逐渐缩小，使流体的旋转速度加快，动能增大、动能消能率也增大，且水流旋转离心力的作用，洞壁压强高，不易发生空蚀破坏；另外消能主要发生在旋流洞内形成的空气柱附近的内螺旋流区域，而在旋流洞壁的变化趋势较为平缓，故在等直径段的旋流洞侧壁均匀布置圆形凸槽增加动能消能。
Rotational flow tunnel structure capable of increasing horizontal rotational flow energy dissipation rate
一种提高水平旋流消能率的旋流洞结构
ZHOU HENG (author) / LIU JING (author) / LU XI (author) / DI SHENGJIE (author) / HUANG PENG (author) / ZHANG YING (author) / WANG WEIGUO (author) / YIN JINBU (author)
2021-07-27
Patent
Electronic Resource
Chinese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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