The Hot Section Technology (HOST) Project is a NASA-sponsored endeavor to improve the durability of advanced gas turbine engines for commercial and military aircraft. Through improvements in the analytical models and life prediction systems, designs for future hot section components , the combustor and turbine, will be more accurately analyzed and will incorporate features required for longer life in the more hostile operating environment of high performance engines

Ensign, C. R.

Sokolowski, D. E.

English

NASA Technical Reports Server

TURBINE ENGINE HOT SECTION TECHNOLOGY (HOST) PROJECT 
Daniel E. Sokolowski 
and 
C. Robert Ensign 
National Aeronautics and Space Administration 
Lewis Research Center 
Cleveland, OH 44135 
The Hot Section Technology (HOST) Project is a NASA-sponsored endeavor to 
improve the durability of advanced gas turbine engines for commercial and 
mi 1 itary aircraft. Through improvements in the analytical models and 1 ife 
prediction systems, designs for future hot section components -- the combustor 
and turbine -- will be more accurately analyzed and will incorporate features 
required for longer 1 ife in the more hostile operating environment of high 
performance engi nes . 
Started in 1981, the project has activities presently planned through 1989 
with an estimated total cost of $50-mi 1 1  ion. While the focused research 
activities are necessarily analytical in nature, significant experimental 
testing is required for benchmark quality assessments as-well as model 
verifications. The efforts are being conducted in-house at the NASA Lewis 
Research Center, under contracts at major domest ic turbine engine 
manufacturers, and under grants to qualified universities. Currently, the 
contract and grant funding equals about 60-percent of the total. 
At NASA Lewis Research Center, the HOST project is the major element in a 
project management and coordination office and serves as the focal point for 
advocacy, funding, technical coordination, and information exchange. This 
workshop serves as the primary vehicle for this last function; that is, to 
disseminate information and elicit the exchange of ideas among participants. 
The activities of the HOST project are accomplished within six disciplines as 
shown in Figure 1. Management of the project's efforts is delegated to six 
Subproject Managers (Figure 2) in the fo1 lowing areas: Structural Analysis, 
Fatigue & Fracture, Surface Protection, Combustion, Turbine Heat Transfer, and 
High Temperature Instrumentation. Structural Analysis includes research into 
thermal mechanical load models, component geometry specific models, and 3-D 
inelastic analysis methods development, Fatigue and Fracture includes 
constitutive model development for both isotropic and anisotropic materi als, 
including single crystal and directionally solidified forms. It also includes 
research in life prediction methods for creep-fatigue interactions, and 
elastoplastic crack propagation. The Surface Protection research includes 
studies of corrosion and oxidation phenomena, environmental mechanics models, 
and metallic and thermal barrier coating analysis method developments. The 
https://ntrs.nasa.gov/search.jsp?R=19860002029 2020-03-20T16:13:45+00:00Z
Combustion work includes aerothermal mode1 assessment and development, 
dilution jet modeling, high pressure flame radiation/heat flux testing, and 
development of a thermal structural cyclic test facility. The Turbine Heat 
Transfer area is studying 2-D and 3-D flow and heat transfer on airfoil 
external boundaries, emphasizing boundary 1 ayer transition and viscous 
modeling. It also investigates coolant passage heat transfer, including 
midchord jet impingement cooling and rotational passage effects, 
Instrumentation is being developed to obtain high temperature, benchmark 
quality data to develop and verify the analysis methods. These include flow 
sensors (LDV), heat flux sensors (thin film), strain sensors (1800~~ static 
thin film), gas temperature sensors (frequency compensated), and hot section 
optical viewing systems. 
Schedules for activities under each discipline are shown in Figures 3-8, 
Because of the nature of the problem of durability, interdisciplinary 
cooperation is often required and the synergistic effects have proven to be 
beneficial. For example, researchers in combustors, high temperature 
instrumentation, and structural analysis are jointly investigating combustor 
liner behavior, modeling, and life prediction. 
Workshop publications and most contractor final reports carry the label "For 
Early Domestic DisseminationM (FEDD) to protect national interests and, thus, 
are available only to qualified U.S. citizens. While several contractor final 
reports have been published recently, they represent initial phases of 
multi-phased work. Thus, aside from this annual workshop report, only a few 
reports are available at this time. 
SIRUCIURAL 
ANALYSIS 
ANALYSIS 
MEIHODS 
I 
&FRACTURE PROTECTION COMBUSTION HEAT TRANSFER INSTRUMENTATION 
I 
Figur,e 1. - Work breakdown s t r u c t u r e .  
MATERIALS & STRUCTURES 
DIRECTORATE AERONAUTICS MRECTORATE 
I I STRUCTURES AND I I PROJECT MANAGEMENT 1 I AEROTHERMODYNRMICS I I 
MECHANICAL TECHNOLOGIE 
STRUCTURAL ANALYSIS - 
HOST PROJECT 
D.E. SOKOLOWSKI 
MANAGER 
I 
I i 
MATERIALS DIVISION I \ I \ \ 
I \ 
INSTRUMENTATaN DIVISN)N 
I 
I \\ 
Figure 2 .  - P r o j e c t  o f f i c e  organiza t ion .  
THERMAL DATA TRANSFER 
STRUCTURAL MET HODS 
COMPONENT SPECIFIC COMPONENT RELATED, TIME- 
DEPENDENT, THERMAL- 
MECHANICAL LOAD HISTORY 
ADVANCED 3-0  INELASTIC 
3D INELASTIC ANALYSES ANALYSIS STRUCTURALISTRESS METHODS AND 
SOLUTION STRATEGY 
L ~ N E ~  CYCLIC RIG BURNER STRUCTURAL1 LlFE ANALY SlS 
HIGH TEMPERATURE INTEGRATED EXPERIMENTAL 
STRUCTURES LAB /ANALYSIS RESEARCH 
MATERIAL CONSTITUTIVE MATERIAL BEHAVIOR 
CD d ? - I l l 1  Figure 3 .  - Structural  analysis.  
ISOTROPIC MATERIAL LIFE CREEP-FATIGUE CRACK 
INITIATION MODELS 
ANISOTROPIC LIFE/ CREEP-FATIGUE CRACK 
CONSTITUTIVE MODEL INITIATION MODELS 
ISOTROPIC MATERIAL UNIFIED CONST ITUTlVE 
CONSTITUTIVE BEHAVIOR MATERIALS MODEL 
HIGH TEMPERATURE CRACK SMALL CRACK 
PROPAGAT1QN MODEL 
FATIGUE LAB VlTALlZAT ION COMPUTER CONTROLLED 
HlGH TEMPERATURE 
THERMAL MECHANICAL 
FRACTURE MECHANICS LAB CYCLIC TESTING 
Figure 4.  - Fatigue and fracture .  
DEPOSlTlON THEORY 
ROLE OF OXIDE SCALE AND 
CORROSlON LIFE PREDlCTlON COATING COMPOSITION 
IN HOT CORROSION 
THERMAL BARRIER COATING TECHNOLOGY MODEL 
FOR TBC LIFE ANALYSIS 
LIFE PREDICTION VERIFIED PREDICTION 
VERlFlCATlON 
TECHNOLOGY TO PREDICT 
OXIDATION LIFE PREDICTION CYCLIC OXIDATION/COATING 
DEGRADATION 
DUAL CYCLE ATTACK COMBINED CORROSION1 OXIDATION EFFECTS 
RIGIENGINE CORRELATION 
VERIFICATION VERIFIED CORRELATIONS 
LU IJZ.IIW 
Figure 5. - Surface protection.  
AEROTHERMAL MODELING KEY MODEL AND DATA 
ASSESSMENT DEFICIENCIES IDENTIFIED 
COMBUSTION MODELING NEW PHY SlCAL MODELS 
DEVELOPMENT AND COMPUTING METHODS 
MULTIPLE JET DILUTION EXIT TEMPERATURE PROFILE 
PREDICTION TECHNOLOGY 
FLAME RADIATIONIHEAT HIGH PRESSURE FLAME 
RADIATION AND HEAT FLUX 
DILUTION JET ANALY SlS JET MIXING MODEL 
LINER CYCLIC RIG CY CLlC TEST FACILITY 
Figure 6. - Combustion. 
5 
- TRANSIT1ON 
- AlRFOlL MODEL 2 0  ROTATION 
lNTERACTlON HEAT TRANSFER AlRFOlL lNTERACTlOM EFFECTS 
3D FLOW AND HEAT 
TRANSFER VISCOUS FLOW MODELING 
- NON ROTATING OF 3 0  VELOCITIES 
- ROTATING VISCOUS MODELlNG OF 3D ROTATION EFFECTS 
MIDCHORD IMPINGEMENT MULTlPLE JET IMPINGEMEWV 
COOLANT PASSAGE ROTATION EFFECTS 
HEAT TRANSFER ON INTERNAL HEAT TRANSFER 
LDV TURBULENCE/ WARM TURBINE LDV 
VELOCITY STUDY SURVEY TECHNOLOGY 
FLOW, HEAT TRANSFER, 
STRAlN PREDICTION 
CD 87-13? 
Figure 7. - Turbine heat transfer. 
PROGRAM 
ELEMENT 
GAS TEMPERATURE SENSOR 
HOT SECTION VIEWING 
SYSTEM 
STATIC STRAIN SENSOR 
STRAlN SYSTEM 
TECHNOLOGY 
HEAT FLUX SENSORS 
ADVANCED STRAIN ALLOYS 
STRAlN GAGE LAB 
FLOW MEASUREMENTS 
EXPECTED 
RESULT 
1 kHz RESPONSE DYNAMIC 
GAS TEMPERATURE PROBE 
STEREOSCOPIC FIBER OPTIC 
VIEWING OF OPERATING 
COMPONENT 
MINIATURE STRAlN GAGE 
1800° F CAPABILITY 
GAGE APPLICATION 
TECHNOLOGY 
TOTAL FLUX SENSORS 
MULTIPLE ELEMENT ALLOYS 
FOR STRAlN GAGES 
INHOUSE GAGE EVALUATIOWZ 
LASER ANEMOMETER 
FOR LeRC SYSTEM 
C D - U Z - l 3 l  
Figure 8. - Instrumentation. 


Turbine engine Hot Section Technology (HOST) project

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