哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2014年
6期
784-788
,共5页
摇摆运动%强迫循环%流量波动%驱动压头%理论模型%影响机理
搖襬運動%彊迫循環%流量波動%驅動壓頭%理論模型%影響機理
요파운동%강박순배%류량파동%구동압두%이론모형%영향궤리
rolling motion%forced circulation%flow fluctuation%pressure head%theoretical model%Influence mecha-nism
针对摇摆条件下的单相强迫循环流量瞬变特性开展流量波动影响机理研究。通过调节离心泵转速、阀门状态及摇摆参数分析驱动压头、回路阻力及附加压降对流量波动幅值的影响。通过建立摇摆条件下单相流量波动方程,系统地揭示摇摆运动的影响机理。结果表明,增加驱动压头和回路阻力使得相对流量波动幅值减小,增加附加压降使得相对流量波动幅值增大。当驱动压头大于附加压降幅值的10~11倍时,摇摆对单相强迫循环流量波动的影响可忽略。流量波动方程分析结果与流量波动实验结果有很好的一致性。
針對搖襬條件下的單相彊迫循環流量瞬變特性開展流量波動影響機理研究。通過調節離心泵轉速、閥門狀態及搖襬參數分析驅動壓頭、迴路阻力及附加壓降對流量波動幅值的影響。通過建立搖襬條件下單相流量波動方程,繫統地揭示搖襬運動的影響機理。結果錶明,增加驅動壓頭和迴路阻力使得相對流量波動幅值減小,增加附加壓降使得相對流量波動幅值增大。噹驅動壓頭大于附加壓降幅值的10~11倍時,搖襬對單相彊迫循環流量波動的影響可忽略。流量波動方程分析結果與流量波動實驗結果有很好的一緻性。
침대요파조건하적단상강박순배류량순변특성개전류량파동영향궤리연구。통과조절리심빙전속、벌문상태급요파삼수분석구동압두、회로조력급부가압강대류량파동폭치적영향。통과건립요파조건하단상류량파동방정,계통지게시요파운동적영향궤리。결과표명,증가구동압두화회로조력사득상대류량파동폭치감소,증가부가압강사득상대류량파동폭치증대。당구동압두대우부가압강폭치적10~11배시,요파대단상강박순배류량파동적영향가홀략。류량파동방정분석결과여류량파동실험결과유흔호적일치성。
With a focus on the transient properties of the flow of single-phase forced circulation under rolling condi-tions, a study of the mechanism of the effects of flow fluctuation was carried out. The influences of the pressure head, flow resistance and additional pressure drop were analyzed by regulating the rotation speed of the centrifugal pump, state of the valve and rolling parameters respectively. And the mechanism of the effects of the rolling motion was revealed systematically by setting up the single-phase flow fluctuation equation. The results indicate that the fluctuation amplitude of the relative flow rate in rolling motion decreases rapidly as the pressure head and the flow resistance of the entire loop increase, and increase as the amplitude of the additional pressure drop increases. When the pressure head is higher than 10 to 11 times the amplitude of the additional pressure drop, the effect of the roll-ing motion on single-phase flow fluctuation could be neglected. The analysis result of the flow fluctuation equation is quite consistent with the results of the flow fluctuation experiments.