原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2014年
4期
617-621
,共5页
马在勇%仇子铖%巫英伟%田文喜%苏光辉%秋穗正
馬在勇%仇子鋮%巫英偉%田文喜%囌光輝%鞦穗正
마재용%구자성%무영위%전문희%소광휘%추수정
液态金属%临界热流密度%沉积%夹带
液態金屬%臨界熱流密度%沉積%夾帶
액태금속%림계열류밀도%침적%협대
liquid metal%critical heat flux%deposition%entrainment
为对圆管中环状流烧干型沸腾临界进行预测,建立了考虑液滴沉积夹带作用的液膜蒸干模型。沉积率、夹带率等相关关系式采用水等常规流体的已有关系式。在一定参数范围内,将模型预测结果与实验数据和经验关系式进行了比较。结果表明:基于常规流体的液膜蒸干模型大体可应用于液态金属,但在临界热流密度(CHF)较大时可能造成较大偏差;钠、钾两种液态金属在CHF较低时预测准确度区别不大,但在CHF较高时区别较为明显。为更加准确预测液态金属CHF ,应开发专门的沉积率、夹带率等相关关系式。
為對圓管中環狀流燒榦型沸騰臨界進行預測,建立瞭攷慮液滴沉積夾帶作用的液膜蒸榦模型。沉積率、夾帶率等相關關繫式採用水等常規流體的已有關繫式。在一定參數範圍內,將模型預測結果與實驗數據和經驗關繫式進行瞭比較。結果錶明:基于常規流體的液膜蒸榦模型大體可應用于液態金屬,但在臨界熱流密度(CHF)較大時可能造成較大偏差;鈉、鉀兩種液態金屬在CHF較低時預測準確度區彆不大,但在CHF較高時區彆較為明顯。為更加準確預測液態金屬CHF ,應開髮專門的沉積率、夾帶率等相關關繫式。
위대원관중배상류소간형비등림계진행예측,건립료고필액적침적협대작용적액막증간모형。침적솔、협대솔등상관관계식채용수등상규류체적이유관계식。재일정삼수범위내,장모형예측결과여실험수거화경험관계식진행료비교。결과표명:기우상규류체적액막증간모형대체가응용우액태금속,단재림계열류밀도(CHF)교대시가능조성교대편차;납、갑량충액태금속재CHF교저시예측준학도구별불대,단재CHF교고시구별교위명현。위경가준학예측액태금속CHF ,응개발전문적침적솔、협대솔등상관관계식。
A film dryout model considering the deposition and entrainment of droplets w as established to obtain the critical heat flux (CHF) of liquid metal in the flow of annular two-phase flow in tubes . The correlations of deposition rate , entrainment rate and so on for conventional fluids (e .g . water ) were used , and the initial entrainment fraction was determined according to experimental data . T he results show that the correlations for conventional fluids could be used for predicting CHF of liquid metal approximately , but relatively large error might occur for large heat flux .The accuracy of this model for sodium and potassium is similar for small heat flux , but has some differences for large heat flux . Special correlations of deposition rate ,entrainment rate and so on should be developed in order to predict the CHF of liquid metal more accurately .