CAJ | 학술논문

利用 FLUENT 软件对过热蒸汽分级机转轴的篦齿密封的内部流场进行数值模拟，对影响其性能的部分因素进行分析。结果表明，篦齿密封两端压差对泄漏量的影响非常明显，压差越大，泄漏量越大；篦齿密封的泄漏量随着节流间隙宽度增大而增大，但两者是非线性的关系；在齿形角不变的情况下，篦齿空腔深度小于2 mm 时对密封泄漏量的影响很大，而空腔深度大于2 mm 时对密封泄漏量的影响很小；转轴转速对泄漏量基本没有影响。通过试验验证了数值模拟方法计算篦齿密封泄漏量的可行性。
이용 FLUENT 연건대과열증기분급궤전축적비치밀봉적내부류장진행수치모의，대영향기성능적부분인소진행분석。결과표명，비치밀봉량단압차대설루량적영향비상명현，압차월대，설루량월대；비치밀봉적설루량수착절류간극관도증대이증대，단량자시비선성적관계；재치형각불변적정황하，비치공강심도소우2 mm 시대밀봉설루량적영향흔대，이공강심도대우2 mm 시대밀봉설루량적영향흔소；전축전속대설루량기본몰유영향。통과시험험증료수치모의방법계산비치밀봉설루량적가행성。
The internal flow of the straight labyrinth seal of superheated steam classifier rotor shaft was numerically sim-ulated by software FLUENT,and parts of the effect factors on straight labyrinth seal were studied.The results show that the leakage of labyrinth seal is obviously impacted by the pressure differential,and it is increased with the increase of pressure differential.The leakage of labyrinth seal is increased with the increase of the throttle gap width,but the relation is non-lin-er.Under the condition of the tooth profile angle is constant,the labyrinth seal cavity depth has great influence on the leak-age when it is less than 2 mm,and has little influence on the leakage when it is more than 2 mm.The speed of the rotating shaft has no influence on the leakage.The feasibility to calculating the leakage of labyrinth seal with numerical simulation method was validated by the experiments.