Engineering topics

Herda, D. A.

Publications and source records attributed to Herda, D. A..

2 records

NASA NTRS1995

High Pressure Oxidizer Turbopump (HPOTP) inducer dynamic design environment

The dynamic environment must be known to evaluate high pressure oxidizer turbopump inducer fatigue life. This report sets the dynamic design loads for the alternate turbopump inducer as determined by water-flow rig testing. Also, guidelines are given for estimating the dynamic environment for other inducer and impeller applications.

Herda, D. A.↗

NASA NTRS1992

A comparison of high cycle fatigue methodologies

To evaluate alternate turbopump development (ATD) high cycle fatigue (HCF) methodology, a comparison was made with the space shuttle main engine (SSME) methodology. This report documents the comparison and evaluates ATD's HCF system.

Herda, D. A.↗