Upload
yadid
View
82
Download
0
Embed Size (px)
DESCRIPTION
CFX 01/07 HTGR. Pebble bed. 檢驗 _1. 檢驗 _2. Contours of velocity (m/s). Multi-point. Single-point. Contours of temperature (K). Multi-point. Single-point. Contours of Temperature (K). Multi-point. Single-point. Vectors of Velocity (m/s). Multi-point. Single-point. - PowerPoint PPT Presentation
Citation preview
CFX 01/07 HTGR
Pebble bed
Total Volume
(m3)
Heat Source
(W/m3)
Total Power
(W)
Multi-Pointk -ε model 0.001747864 6.32*106 1.104*104
RSM model 0.001805235 6.32*106 1.141*104
Single-Pointk -ε model 0.001827699 6.04*106 1.104*104
RSM model 0.001828511 6.23*106 1.141*104
檢驗 _1
理論半徑(m)
模擬半徑(m)
誤差(% )
Multi-Pointk -ε model 0.025 0.0247427 1.021
RSM model 0.025 0.0248796 0.486
Single-Pointk -ε model 0.025 0.0249819 0.0724
RSM model 0.025 0.0249856 0.0576
檢驗 _2
Contours of velocity (m/s)
Multi-point Single-point
Contours of temperature (K)
Multi-point Single-point
Contours of Temperature (K)
Multi-point Single-point
Vectors of Velocity (m/s)
Multi-point Single-point
Contours of Tur. intensity
Multi-point Single-point
Vectors of Velocity (m/s)
Multi-point Single-point
Nusselt number (Nu)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
Z en ith an g le v a ria tio n (F)
0
100
200
300
400
500
600
700
800
900
1000
Nus
eelt
num
ber (
Nu)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
Z en ith an g le v a ria tio n (F)
0
100
200
300
400
500
600
700
800
Nus
selt
num
ber (
Nu)
Multi-point Single-point
整體架構 _ 1 模式
速度溫度(固 )
渦流
紊流
溫度(流 )
Multi-Point Single-Point
快
低
弱
小
低
慢
高
強
大
高
熱傳較好
接近接觸點時,流體形成的渦流較大,使熱容易在此區域累積,導致流體溫度提高,與固體之間的△ T變小,浪費了因紊流強而熱傳能力較好。
Multi-Point 的設計,因空間較小,因而影響壓迫到流體的流動。