<p class="MsoNormal" style="text-indent: 24.0000pt">The&nbsp;turbine&nbsp;rotor&nbsp;inlet&nbsp;temperature&nbsp;of&nbsp;modern&nbsp;aero-engines&nbsp;has&nbsp;continuously&nbsp;increased&nbsp;in&nbsp;order&nbsp;to&nbsp;achieve&nbsp;higher&nbsp;thrust&nbsp;weight&nbsp;ratio&nbsp;and&nbsp;thermal&nbsp;efficiency,&nbsp;which&nbsp;requires&nbsp;higher&nbsp;cooling&nbsp;effectiveness&nbsp;for&nbsp;turbine&nbsp;components.&nbsp;The&nbsp;turbine&nbsp;shroud&nbsp;is&nbsp;exposed&nbsp;to&nbsp;the&nbsp;blade&nbsp;tip&nbsp;leakage&nbsp;flow,&nbsp;and&nbsp;has&nbsp;become&nbsp;a&nbsp;common&nbsp;limiting&nbsp;factor&nbsp;for&nbsp;the&nbsp;turbine&nbsp;stage&nbsp;of&nbsp;advanced&nbsp;aero-engines.&nbsp;The&nbsp;three-dimensional&nbsp;numerical&nbsp;simulation&nbsp;on&nbsp;the&nbsp;unsteady&nbsp;film&nbsp;cooling&nbsp;characteristics&nbsp;of&nbsp;the&nbsp;high&nbsp;pressure&nbsp;turbine&nbsp;shroud&nbsp;for&nbsp;an&nbsp;aero-engine&nbsp;under&nbsp;the&nbsp;rotor-stator&nbsp;interaction&nbsp;and&nbsp;the&nbsp;high&nbsp;blade&nbsp;rotation&nbsp;speed&nbsp;was&nbsp;conducted.&nbsp;The&nbsp;sliding&nbsp;grid&nbsp;technology&nbsp;was&nbsp;used&nbsp;to&nbsp;realize&nbsp;the&nbsp;relative&nbsp;movement&nbsp;between&nbsp;the&nbsp;turbine&nbsp;blade&nbsp;and&nbsp;the&nbsp;turbine&nbsp;shroud,&nbsp;and&nbsp;the&nbsp;rotor-stator&nbsp;interaction.&nbsp;Effects&nbsp;of&nbsp;blade&nbsp;rotation&nbsp;and&nbsp;blowing&nbsp;ratios&nbsp;on&nbsp;the&nbsp;unsteady&nbsp;film&nbsp;cooling&nbsp;performance&nbsp;of&nbsp;the&nbsp;high&nbsp;pressure&nbsp;turbine&nbsp;shroud&nbsp;were&nbsp;revealed.&nbsp;The&nbsp;improved&nbsp;design&nbsp;for&nbsp;the&nbsp;film&nbsp;cooling&nbsp;structure&nbsp;of&nbsp;the&nbsp;turbine&nbsp;shroud&nbsp;was&nbsp;conducted.&nbsp;It&nbsp;is&nbsp;found&nbsp;that&nbsp;the&nbsp;film&nbsp;cooling&nbsp;characteristics&nbsp;of&nbsp;the&nbsp;turbine&nbsp;shroud&nbsp;significantly&nbsp;present&nbsp;an&nbsp;unsteady&nbsp;and&nbsp;periodic&nbsp;phenomenon.&nbsp;Blade&nbsp;tip&nbsp;clearance&nbsp;leakage&nbsp;flow,&nbsp;leakage&nbsp;vortex&nbsp;and&nbsp;mainstream&nbsp;suppression&nbsp;have&nbsp;important&nbsp;effects&nbsp;on&nbsp;the&nbsp;film&nbsp;cooling&nbsp;performance&nbsp;of&nbsp;the&nbsp;high&nbsp;pressure&nbsp;turbine&nbsp;shroud.&nbsp;It&nbsp;is&nbsp;necessary&nbsp;to&nbsp;prevent&nbsp;the&nbsp;insufficient&nbsp;cooling&nbsp;margin&nbsp;of&nbsp;the&nbsp;first&nbsp;column&nbsp;film&nbsp;holes&nbsp;under&nbsp;the&nbsp;low&nbsp;blowing&nbsp;ratio.</p>

Unsteady Film Cooling Performance on the High Pressure Turbine Shroud Under Rotor-Stator Interaction  for an Aero-Engine

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2021/volume/84898

Turbo Expo 2021

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.