A few thoughts: Once established pears do not need regular water, but can get by on deep watering. The blueberries will need regular water especially during fruit set. This may be a minor point. Apart from that they seem as though they would be good companions. The hedge would need to be small enough that you can reach across to harvest the pears. I like your design concept.

Here is a link that might be useful: HarvestToTable.com

Thanks. Good reminder on the watering needs.

I will use the pear tree as a speciman, espaliered on a trellis. Not sure whether to put it in front of or behind the blueberry hedge which won't be more than 4' high. There will a space to stand in between hedge and pear tree should I choose to place tree behind the hedge but the more I think about it it would make sense to place tree and trellis in front of hedge.

I will use a soaker hose for the blueberries when they need more water.

Blueberries need acidic soil to do well. Will pears do ok with that?

Here is what the Arbor Day Foundation website states:

"The Bartlett pear grows best in slightly acidic, deep, heavy, moist, but well drained soil. Other soil types are tolerated, but may produce a lighter crop. Pear trees are especially sensitive to salt."

Cool! They should do well then.