动力工程学报
動力工程學報
동력공정학보
JOURNAL OF POWER ENGINEERING
2012年
7期
508-512
,共5页
江路毅%刘网扣%张兆鹤%崔琦
江路毅%劉網釦%張兆鶴%崔琦
강로의%류망구%장조학%최기
高低齿汽封%蜂窝汽封%孔式阻尼汽封%密封性能
高低齒汽封%蜂窩汽封%孔式阻尼汽封%密封性能
고저치기봉%봉와기봉%공식조니기봉%밀봉성능
stepped labyrinth seal%honeycomb seal%hole-pattern damper seal%seal performance
使用商用CFD软件Fluent对高低齿汽封、蜂窝汽封及孔式阻尼汽封进行了三维数值模拟,得到三种汽封在不同压比、轴转速和汽封相对间隙时的密封性能,并将高低齿汽封和蜂窝汽封计算值与试验数据进行了对比.结果表明:高低齿汽封流量系数随压比增大而增大,随转速加快而略有减小,随相对间隙的增大而减小;蜂窝汽封与孔式阻尼汽封的流量系数均随压比增大而减小,随转速加快而略有减小,基本呈直线变化规律,随相对间隙的增大而增大;在相同的条件下,蜂窝汽封的漏汽量比高低齿汽封的漏气量减少10%,而孔式阻尼汽封的漏汽量比蜂窝汽封漏汽量减少6%.
使用商用CFD軟件Fluent對高低齒汽封、蜂窩汽封及孔式阻尼汽封進行瞭三維數值模擬,得到三種汽封在不同壓比、軸轉速和汽封相對間隙時的密封性能,併將高低齒汽封和蜂窩汽封計算值與試驗數據進行瞭對比.結果錶明:高低齒汽封流量繫數隨壓比增大而增大,隨轉速加快而略有減小,隨相對間隙的增大而減小;蜂窩汽封與孔式阻尼汽封的流量繫數均隨壓比增大而減小,隨轉速加快而略有減小,基本呈直線變化規律,隨相對間隙的增大而增大;在相同的條件下,蜂窩汽封的漏汽量比高低齒汽封的漏氣量減少10%,而孔式阻尼汽封的漏汽量比蜂窩汽封漏汽量減少6%.
사용상용CFD연건Fluent대고저치기봉、봉와기봉급공식조니기봉진행료삼유수치모의,득도삼충기봉재불동압비、축전속화기봉상대간극시적밀봉성능,병장고저치기봉화봉와기봉계산치여시험수거진행료대비.결과표명:고저치기봉류량계수수압비증대이증대,수전속가쾌이략유감소,수상대간극적증대이감소;봉와기봉여공식조니기봉적류량계수균수압비증대이감소,수전속가쾌이략유감소,기본정직선변화규률,수상대간극적증대이증대;재상동적조건하,봉와기봉적루기량비고저치기봉적루기량감소10%,이공식조니기봉적루기량비봉와기봉루기량감소6%.
A 3D numerical simulation was performed on the stepped labyrinth, honeycomb and hole pattern damper seal using the commercial CFD software Fluent, during which the seal performance of above 3 seals was respectively obtained at different pressure ratios, rotating speeds and relative clearances, while a com- parison made between calculated results and experimental data for the stepped labyrinth seal and honeycomb seal. Results show that for the stepped labyrinth seal, the flow coefficient increases with rising pressure ratio and reducing relative clearance, and drops slightly with rising rotating speed; whereas for both the honeycomb and hole-pattern damper seal, the flow coefficient increases with reducing pressure ratio and rising relative clearance, and drops slightly with rising rotating speed, indicating basi- cally a linear variation law. Under same conditions, the steam leakage of a honeycomb seal is 10% less than that of a labyrinth seal, and 6% higher than that of a hole-pattern damper seal.