KIM, CH LEE, YB 2024-01-21T21:35:29Z 2024-01-21T21:35:29Z 2022-01-10 1994-07 0742-4787 https://pubs.kist.re.kr/handle/201004/145547 Test results are presented for rotordynamic coefficients and leakage for three annular seals which use an anti-swirl self-injection concept to yield significant improvement in whirl frequency ratios as compared to smooth and damper seals. A new anti-swirl self-injection mechanism is achieved by deliberately machining self-injection holes inside the seal stator to partially divert inlet flow into the anti-swirl direction. The anti-swirl self-injection mechanism is used to achieve effective reduction of the tangential flow which is considered as a prime cause of rotor instability in high performance turbomachinery. Test results show that the self-injection mechanism significantly im,proves whirl frequency ratios; however, the leakage performance degrades due to the introduction of the self-injection mechanism. Through a series of tests, an optimum anti-swirl self-injection seal which uses a labyrinth stator surface with anti-axial flow injections is selected to obtain a significant improvement in the whirl frequency ratio as compared to a damper seal, while showing moderate leakage performance. The best whirl frequency ratio is achieved by an anti-swirl self-injection seal of 12 holes anti-swirl and 6 degree anti-leakage injection with a labyrinth surface configuration. When compared to a damper seal, the optimum configuration out-performs the whirl frequency ratio by a factor of 2. English ASME CONFIGURATIONS TESTS RESULTS FOR ROTORDYNAMIC COEFFICIENTS OF ANTISWIRL SELF-INJECTION SEALS Article 10.1115/1.2928873 1 JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, v.116, no.3, pp.508 - 513 JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME 116 3 508 513 scie scopus A1994NZ73900014 2-s2.0-0028042846 Engineering, Mechanical Engineering Article CONFIGURATIONS